Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab0e6944321ac9e6…

MALICIOUS

PDF

82.0 KB Created: 2021-05-14 16:22:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9122479f2e21a2d917178d123a787353 SHA-1: 75325f83e9d48adb629981c45972acb6741f78f7 SHA-256: ab0e6944321ac9e6a6cb7d1641d468256a1d8942a2cc3d081e104074dcbd4a94
216 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for PDF_SEO_LINK_FARM, indicating it's part of a link farm designed to boost search engine rankings, and a PDF_URI pointing to a suspicious URL. The document body, though heavily obfuscated, contains a search query related to Cisco IP phones, suggesting a lure to a malicious site. The presence of a password-protected archive lure and callback phishing lure heuristics further support a phishing or scam-related attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://vilenefex.ru/strik?utm_term=how+do+i+set+up+voicemail+on+cisco+ip+phone+7942
    • https://kemigaguni.weebly.com/uploads/1/3/1/0/131070112/mipoworuvo-jumegunobadu.pdf
    • http://vomimaforotagi.mywebcommunity.org/what_is_the_hardest_word_to_guess.pdf
    • https://kivalake.weebly.com/uploads/1/3/4/8/134885121/xojejagox.pdf
    • https://sasanufodokedu.weebly.com/uploads/1/3/0/9/130969760/vumaferakofilopivot.pdf
    • https://xufizuwerab.weebly.com/uploads/1/3/0/7/130738786/a25999.pdf
    • https://telapawuwa.weebly.com/uploads/1/3/5/9/135964826/8826903.pdf
    • https://sedarujewajoto.weebly.com/uploads/1/3/0/9/130968957/xekomufugafemetazen.pdf
    • http://tejidetegowewi.iblogger.org/47113838719.pdf
    • http://misifebofol.mywebcommunity.org/spooktacular_halloween_word_search.pdf
    • https://fewefemuge.weebly.com/uploads/1/3/4/3/134372507/pubanivejaxefuk_digime_xawiboxazitapa_fulez.pdf
    • http://bagutoruramig.mywebcommunity.org/enharmonics_worksheet.pdf
    • http://zikewexer.scienceontheweb.net/gobodobubukosorubirenutus.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/juzewojavomofew/behringer_xenyx_302usb_premium_5-input_mixer_with_mic_preamp.pdf
    • https://uploads.strikinglycdn.com/files/45dc585b-5cb1-4437-959f-cc9955d5c957/reading_strategies_for_high_school_social_studies.pdf
    • https://uploads.strikinglycdn.com/files/6d45d6fc-f210-4139-b28f-0c8ab4543dd0/jepaforudemuzazaxipum.pdf
    • https://s3.amazonaws.com/pazatuv/luwofadebakusa.pdf
    • http://pubabela.rf.gd/60124525085.pdf
    • https://uploads.strikinglycdn.com/files/199f4f09-1476-47d0-936d-54c9f133a534/msi_b150m_mortar_arctic_intel.pdf
    • https://uploads.strikinglycdn.com/files/8cfd399c-c553-4abc-86c9-06a6d85c7490/60958077011.pdf
    • https://s3.amazonaws.com/dixaleko/baby_trend_ez_flex_loc_car_seat_reviews.pdf
    • https://uploads.strikinglycdn.com/files/015a5317-fcb1-49c8-a0ea-31993e100ef1/vue_js_referenceerror_require_is_not_defined.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f839.bin
5cd76a52733cc9c7ffd43f61f8c5518f5d8f37c212743cf049be424aeee2e231		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF839 5788 bytes
font_01_sfnt_off00010be0.bin
414d786b459f0f5d2a731291ef1b870d88176140611ada2eab9f82aaf6e76e23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE0 1940 bytes
font_02_sfnt_off00011516.bin
60eae48f94ba55ea95e4eaaa46507f404d7c6e7468b806054f1615655c1d93c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11516 10764 bytes

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