Malicious PDF — malware analysis report

Static analysis result for SHA-256 649863c6e926181c…

MALICIOUS

PDF

119.8 KB Created: 2021-07-31 12:48:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6b9799ac167e66fde04a58188d649b17 SHA-1: c6697e1fbbe2447f6df344ebefc0872e41422816 SHA-256: 649863c6e926181cbc9aa578bf2531b18bf304fe9a7362d6f13d4c9fbc07c46a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple domains, some of which are hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content or phishing pages. The presence of embedded URLs and the nature of the heuristics indicate a likely spearphishing attachment used to distribute malware or facilitate phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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://bigyikesmedia.com/home/xtremweb/public_html/consultinstitute/web/upload/files/76947720286.pdf In PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be71fc66802---muzajogemawixozodat.pdfIn PDF document text
    • http://provia-events.de/pics/fotos/1/file/13442925065.pdfIn PDF document text
    • http://baschin-heizung.com/meineBilderAlbertGrundschule/file/dirofexusilow.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/relubuzizenev.pdfIn PDF document text
    • https://asken.as/bilder/file/kevudogidasaputuvafejugo.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/d25220eb998f97383a461d9df6432ed0/zokeno.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/15aa4e92861fd4b05e2d4c2896895abf/vegomupagejogofobe.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608656e72251e---xelabip.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081db10930fe---19639886968.pdfIn PDF document text
    • https://minegociomiweb.com/userfiles/file/28842057610.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/3cb9bd3b67b98773a59c5b41b0105737/30070555841.pdfIn PDF document text
    • http://farmaciafici.com/userfiles/files/45495695542.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a678c4033ef---niwagerajevuwupolejomuzi.pdfIn PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/b211c24790b8f17bbf5a55c9897a43c1/dilorugepesunivubozoweguj.pdfIn PDF document text
    • http://se-ty.ru/uploads/userfiles/file/komazobuba.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/0g33pi434oopm52inq5va378gk/34638567909.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/gknffcnq35k0pi1mkh7a2o8o43/fosimobesetozutovov.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/kspkg6tn3hj8f5smlm2pr6s0pn/24420950125.pdfIn PDF document text
    • https://kme.pl/global/app/webroot/uploads/file/16224667150602.pdfIn PDF document text
    • http://apvn.info/userfiles/file/mofaxa.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e2d02d78fcb---82520139429.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=y%C3%B6netim+ve+organizasyon+kitab%C4%B1+erol+eren+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016bed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BED 19920 bytes
SHA-256: 982f9a0940bf23d6b2c76b8d680c87ef4c9a01159d5a0fb9ced6a3b3a16e671a
font_01_sfnt_off00019c5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19C5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001b473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B473 11556 bytes
SHA-256: 8c627215ec250b77b3f8b1eaa1801b6cd8b9cda0ed2ed85bf0d3f44e2c4056e5

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