Malicious PDF — malware analysis report

Static analysis result for SHA-256 72ba050dc1bcf5b1…

MALICIOUS

PDF

101.0 KB Created: 2021-03-24 21:47:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 3f0bb05bb8c28a7c55d63c9fcbecdbfa SHA-1: df7a94a118c75d936cfa5d586f4220be4bcc0c73 SHA-256: 72ba050dc1bcf5b1433df18e0d44a4a56f70b5c00428b73cfb625a88e20080af
196 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier. It contains numerous external links, many of which point to a URL that appears to be an SEO redirector designed for phishing or malware distribution. The PDF also includes a link farm, suggesting an attempt to manipulate search engine results to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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 https://jumiwimov.ru/award?keyword=obra+balada+de+amor+ao+vento+pdf PDF link annotation
    • https://ligavovifoma.weebly.com/uploads/1/3/4/5/134522072/ditudulalibo-turonefox-pifujovenixax-musoninemozu.pdfIn PDF document text
    • https://ledomibab.weebly.com/uploads/1/3/4/8/134858948/zanabeso.pdfIn PDF document text
    • http://dunizajo.66ghz.com/superhero_clipart_free.pdfIn PDF document text
    • https://nibovipuduri.weebly.com/uploads/1/3/0/8/130814681/a54f03b8.pdfIn PDF document text
    • http://xarapover.mygamesonline.org/54794552793.pdfIn PDF document text
    • http://serikanipesemo.iblogger.org/pixar_movie_intro.pdfIn PDF document text
    • http://kimagibasip.22web.org/adb_command_not_found_mac_android_studio.pdfIn PDF document text
    • https://guxesawaxogego.weebly.com/uploads/1/3/4/3/134314991/9286004.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tokudapele/vupataxofaxowejilodotive.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/bufagotilojosidi.pdfIn PDF document text
    • http://moganip.epizy.com/why_does_my_swann_security_camera_keep_going_offline.pdfIn PDF document text
    • https://c6506652-bf5e-4f52-be36-03dbfaede22c.filesusr.com/ugd/f74919_9d73460f986844ecaff82a5c0ee37955.pdf?index=trueIn PDF document text
    • https://55d63786-14d6-44de-84d0-33f1fb383c44.filesusr.com/ugd/45fd81_86e258554548438bb02c6fbac01a2f32.pdf?index=trueIn PDF document text
    • https://17851959-1482-4b49-8222-7b7b0c628459.filesusr.com/ugd/3cb679_145fc717a862454ea289a1fa1724d401.pdf?index=trueIn PDF document text
    • http://tufelurokid.epizy.com/linking_action_verb_phrase_worksheet.pdfIn PDF document text
    • http://wotituxisu.rf.gd/zugalipawexosisi.pdfIn PDF document text
    • http://jotudokizer.onlinewebshop.net/11880394308.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/14408554718.pdfIn PDF document text
    • http://viwefar.rf.gd/xunojipeviv.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/rockstar_movie_audio_song_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/xegoxokerapirigimu.pdfIn PDF document text
    • http://gibexuge.rf.gd/razodurudinetuj.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013e45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E45 4976 bytes
SHA-256: 3b5036ddc4a597ba683aae819904918aacc9e46d7820c74e037af88e7b3b4048
font_01_sfnt_off00014f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F13 14592 bytes
SHA-256: 6d6a91544ba829840ecb29cd033ba4187185d41a0f0598b9a5f4da51544c70d4
font_02_sfnt_off0001785a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1785A 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361