Malicious PDF — malware analysis report

Static analysis result for SHA-256 e84d2c6a18f261f7…

MALICIOUS

PDF

77.9 KB Created: 2021-03-18 22:39:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f25b9576cd0b19f961aa5b184f0404ef SHA-1: 6874ba6971ab84c3f50a11d944fdcd583c5a1663 SHA-256: e84d2c6a18f261f7b0afc5dba4ab2d467bfba1a6cf1291c174643ab873ff8aeb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The sample's structure and URL distribution suggest it's part of a campaign to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • 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 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 https://botokaw.ru/award?keyword=afficheur+lcd+arduino+programme+pdf PDF link annotation
    • http://govuxojikasumot.scienceontheweb.net/beginner_disney_piano_sheet_music.pdfIn PDF document text
    • http://musomojil.mywebcommunity.org/67213533900.pdfIn PDF document text
    • http://zufonirawanowo.iblogger.org/roduvejogixa.pdfIn PDF document text
    • http://vipodesin.22web.org/78006419800.pdfIn PDF document text
    • http://jibakerutev.mypressonline.com/maxipekolexu.pdfIn PDF document text
    • http://jaxotibovafel.iblogger.org/33948166336.pdfIn PDF document text
    • http://silujokiz.mypressonline.com/kozitumujadotenaxode.pdfIn PDF document text
    • http://setokanekema.mygamesonline.org/calculus_on_manifolds.pdfIn PDF document text
    • http://dipukud.iblogger.org/puvefopebopotiwuwitorawud.pdfIn PDF document text
    • http://wojisub.mypressonline.com/the_blacker_the_berry_novel.pdfIn PDF document text
    • http://tuxosuzarug.iblogger.org/29730195094.pdfIn PDF document text
    • http://vedojuburokag.22web.org/bulamax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fe48d0c-d56b-40cb-a5d7-eadbb512b6f4/balboa_spa_control_pr_code.pdfIn PDF document text
    • http://keguwaburafokul.epizy.com/rowdy_wear_anthem_song.pdfIn PDF document text
    • http://sagowef.rf.gd/speak_english_conversation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c5e4cf1-3aef-4e8a-9be3-5366a0a2d56f/31462133221.pdfIn PDF document text
    • http://zesafemumibow.myartsonline.com/70322269398.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7684f0c0-5dcc-4566-9977-ee64414b2bcc/how_do_you_read_a_stock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/132c5f64-8fbf-4650-93ec-a481108da54f/does_tris_die_at_the_end_of_allegiant_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b6cdca9-7906-4178-b626-88b366808b6c/99_names_of_allah_with_benefits_in_english.pdfIn PDF document text
    • http://redireleposagoz.rf.gd/boiler_water_treatment_book.pdfIn PDF document text
    • http://nojikigor.myartsonline.com/74901299084.pdfIn PDF document text
    • http://javajese.epizy.com/motorola_xpr_7550_holster.pdfIn PDF document text
    • http://lebuloxa.epizy.com/angelus_oracion.pdfIn PDF document text
    • http://soruseripekibe.rf.gd/lofasomakowa.pdfIn PDF document text
    • http://nunidekizezovaf.rf.gd/probability_questions_and_answers.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB6 5380 bytes
SHA-256: 8e301ecd8a9c76329e8fb089cf5788ca82909efe204dccc1f0771dfc89ffb413
font_01_sfnt_off000100dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100DC 12028 bytes
SHA-256: 87d90059e852f24b3346cad17987b0eb25477add48886da61b55d5e84360ce4b

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