Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fe37e6b62d80379…

MALICIOUS

PDF

73.2 KB Created: 2021-06-06 12:52:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fc6953d5c68f4775967e20e85148a570 SHA-1: c5b2959e65632a0e3fece43854c60a7a856d2e4b SHA-256: 1fe37e6b62d803797336e5ec2ad559fcd07be7041afbce4e2727eabe1a6260c5
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm designed to host malicious content. ClamAV and ML classifiers strongly indicate this PDF is a phishing or trojan delivery mechanism. The document body, though heavily obfuscated, suggests a lure related to an Amazon Fire TV Stick quick start guide, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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
  • 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://crewmak.ru/pbw?utm_term=amazon+fire+tv+stick+quick+start+guide
    • https://static.s123-cdn-static.com/uploads/4368468/normal_5fe29301f3c59.pdf
    • https://static.s123-cdn-static.com/uploads/4486350/normal_5ffb49b45b816.pdf
    • https://nilitimuxuzadox.weebly.com/uploads/1/3/4/3/134320754/5c27fc1.pdf
    • https://fojevuresuzuj.weebly.com/uploads/1/3/4/8/134881640/47efe1ab8.pdf
    • https://vufemare.weebly.com/uploads/1/3/4/8/134855896/rowojawilagaxir.pdf
    • https://rijivujebevobog.weebly.com/uploads/1/3/4/4/134488471/61a92bf4f0fb87.pdf
    • https://senaduwofajix.weebly.com/uploads/1/3/0/7/130775021/ccfb0f487e17cf.pdf
    • https://tisudarolajese.weebly.com/uploads/1/3/0/8/130813738/6961258.pdf
    • https://wakutoji.weebly.com/uploads/1/3/4/3/134314583/loxemifa_jimivuvan_jopojalewefimez_fulalipateb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/aa8462ca-69ff-4acb-95b1-176f8a393d8b/whirlpool_ultimate_care_ii_dryer_wont_start.pdf
    • https://uploads.strikinglycdn.com/files/b9f79442-d087-4d07-9363-63f065e17f99/55273396840.pdf
    • https://uploads.strikinglycdn.com/files/f4f07352-15ce-43cf-96de-f77c8ea56a50/96070888091.pdf
    • https://uploads.strikinglycdn.com/files/781eef1a-5cf6-4550-aa62-2c6f6891d6de/garmin_drivesmart_55_lmt_review.pdf
    • https://uploads.strikinglycdn.com/files/29f73f23-369c-41c5-bc53-ff8da2d0a4d8/99799031348.pdf
    • https://uploads.strikinglycdn.com/files/c14a90f5-11c6-4175-b44c-c010254da620/resonewizejuvazubel.pdf
    • https://uploads.strikinglycdn.com/files/77760871-bc56-4a53-b1df-e35d07cd2272/47161006150.pdf
    • https://uploads.strikinglycdn.com/files/a9d826f5-2159-4b88-b466-4bf53210f70b/27776055959.pdf
    • https://uploads.strikinglycdn.com/files/595c6d41-cc74-4d02-a5ae-757cba53d26b/39198923652.pdf
    • https://uploads.strikinglycdn.com/files/e1bb0a4a-aa21-4af9-b244-033857fb3be7/expanded_noun_phrases_year_3_worksheet_tes.pdf
    • https://uploads.strikinglycdn.com/files/8ea4c5d2-bab1-4097-a896-d5c5016a1358/fifidoki.pdf
    • https://uploads.strikinglycdn.com/files/0d5d09e3-2611-4c40-808c-8e6c405752ac/learn_python_for_data_science_online.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_off0000df99.bin
a3c6f520e53b0057140a8ada9802593816115774e8d852b8982efe3a4d7f34f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF99 5600 bytes
font_01_sfnt_off0000f298.bin
904703996346ccfd2dd6e4fe19332e4de0f1c030a7e5baba00d05d300c70f5f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF298 10820 bytes

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