Malicious PDF — malware analysis report

Static analysis result for SHA-256 0707afa377d84608…

MALICIOUS

PDF

466.2 KB Created: 2021-07-09 11:49:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 32ea4da0328f8edee1a27d8634fa0028 SHA-1: 615f0092eed2e9ef1434eeaec780019b8c6e4e07 SHA-256: 0707afa377d846085dc048e162c37e68c0b70552a616c5bb7277355f5f3b682a
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a phishing lure, specifically using a link farm pointing to compromised WordPress uploads. The ML classifier and ClamAV detection further support its malicious nature. While no scripts were directly extracted, the presence of embedded URLs and the nature of the heuristics suggest an attempt to trick the user into downloading a malicious file, likely for phishing purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6239

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://mfcwestenkwartier.nl/beta/userfiles/file/95500138072.pdf In PDF document text
    • https://indobaliart.com/sitefiles/file/44919146601.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/31f9eb9aff12922582492974efb402ae/tekivabofav.pdfIn PDF document text
    • https://www.q-jin.ne.jp/ckfinder/userfiles/files/8911797966.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b4723d579---sejejokodugogovinuk.pdfIn PDF document text
    • http://duetsepolno.pl/userfiles/file/55648735475.pdfIn PDF document text
    • http://pantryscan.com/123cars/imagefck/file/69428678501.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c525f9a269e.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/6924230970.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/dcb869e040ea15fc6a5127c79de8e218/33686368468.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/ac49dadaafab278a96b1a8d9ec7564b1/muwusevuvoxejanumuboko.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160841a662f9b2---vazulenog.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/68964184759.pdfIn PDF document text
    • http://paliukenas.lt/i/File/ravanobopufirujobapa.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/b7c5094292b1ccd83cb73f0064bc28d2/gugipinijakikopamene.pdfIn PDF document text
    • http://zubrcup.by/files/files/99413953184.pdfIn PDF document text
    • http://cphs1970.net/clients/877309/File/fujaxed.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/v34lv168162g4psp69op7jcoi7/53085370098.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/848866974d2940e4ef910e83fbb78271/zivepepomijazuzizojuzaje.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/2f9d3dka6asqga7f83r3rok4t2/degelelidumekexi.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/99978623679.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/c4ac13468986a00bbf2615e093d74234/xexaxixazukop.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075974f8c724---30345941338.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/5abcd130b2410a21cd08956a5023327a/bamewikezerawexetenimaxok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=life+on+venus+odes+to+the+voidPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0006a11b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A11B 17292 bytes
SHA-256: 44da404a577e7983f7bf1c970a89ad24e226d7c1cc27767255853f64a9763807
font_01_sfnt_off0006bac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BAC9 10268 bytes
SHA-256: baae95e04c8916f72259e8a484e0d37bffa5259184a5c7412e9c08616555d3a2
font_02_sfnt_off0006d1d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D1D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0006e9ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E9EA 30576 bytes
SHA-256: 24302c47be2e8a4919164960d582bceffe556d42a16e0774a12da7c47359f439
font_04_sfnt_off00072e7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72E7C 2304 bytes
SHA-256: d127d5f031e137e755c5e102c3aa5cec1d48df297ce99386778304fb7a399e63

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