Malicious PDF — malware analysis report

Static analysis result for SHA-256 25a106b1db4545db…

MALICIOUS

PDF

74.2 KB Created: 2021-03-16 08:28:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9dd73847afb2eaa56a38339084cb3bdc SHA-1: 2216542ac8eec7b753adcebf3c98bdbc140db3b5 SHA-256: 25a106b1db4545dbc51db823ea989979e58c01ebf078590f0ba5add1fdb8e99c
176 Risk Score

Malware Insights

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

The file is a PDF that contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or phishing attempt. The 'SE_CALLBACK_LURE' heuristic indicates the document is designed to trick users into calling a phone number, a common tactic in tech support scams and callback phishing. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious intent, likely to redirect users to phishing sites or initiate fraudulent calls.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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=training+needs+assessment+methods+tools+and+techniques+pdf
    • https://xifemobagot.weebly.com/uploads/1/3/4/0/134000541/6740786.pdf
    • https://beperupofifu.weebly.com/uploads/1/3/1/6/131636755/gatuwogu.pdf
    • https://zutupowetor.weebly.com/uploads/1/3/5/3/135350992/waroxopake_pesumize_fekusekig_zeziwode.pdf
    • http://soxitezi.iblogger.org/baby_songs_tamil_video.pdf
    • https://cdn.sqhk.co/xiladuxe/jbAieij/pedutuwosuno.pdf
    • https://zulijijala.weebly.com/uploads/1/3/0/7/130740393/8137891.pdf
    • https://cdn.sqhk.co/bogijifaviba/hhgfOhb/ice_cream_truck_sound_mp3.pdf
    • https://bokefelefu.weebly.com/uploads/1/3/1/3/131383825/6430590.pdf
    • http://rudikonutabo.22web.org/anemia_ferropnica_en_el_embarazo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/feborobegibew/stylish_cv_template_word_free.pdf
    • https://uploads.strikinglycdn.com/files/9ec679b2-f758-4bea-9c85-a8505424ae02/famolime.pdf
    • https://uploads.strikinglycdn.com/files/5ed867cd-bfa4-47d5-b0b1-76baca1eec17/niv_study_bible_zondervan.pdf
    • https://uploads.strikinglycdn.com/files/9ff7daf2-8ac0-4e78-9280-7bce049f148f/keto_prepared_meals_delivery_uk.pdf
    • https://s3.amazonaws.com/risalenefazozo/av-_test_security_report.pdf
    • https://uploads.strikinglycdn.com/files/93bb9cc4-7f3f-4b23-90ac-6b06c1d15c69/shure_ulx_microphone_manual.pdf
    • https://uploads.strikinglycdn.com/files/808abbcd-2795-4296-82b0-cfa6d63c228b/what_does_a_foggy_fish_tank_mean.pdf
    • https://uploads.strikinglycdn.com/files/85c21fe4-0726-4d32-a559-14a40da06d19/onenote_2013_tutorial_francais.pdf
    • https://uploads.strikinglycdn.com/files/150ffe70-6c7e-48bc-9d21-04ec171d734a/roadmaster_new_bike_price_in_bd.pdf
    • https://uploads.strikinglycdn.com/files/95bdf17b-9108-4109-ba6c-18ae79133bd3/14613385671.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e420.bin
a381b062e9f35641905dbbaab41496da57aeecd5786511a3bb4946b9c5dc4bd5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE420 5644 bytes
font_01_sfnt_off0000f722.bin
88289a947e4c143e1ffb400c455fc22fd08548f55e458b1761cad4b4f5f59d00		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF722 10536 bytes

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