Malicious PDF — malware analysis report

Static analysis result for SHA-256 82758aa639c58757…

MALICIOUS

PDF

88.1 KB Created: 2021-03-21 01:40:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1f491b3d9962d25be2c4d1a2b022fc7c SHA-1: 54339a03624b03a3b079ddf170765c9008d93daf SHA-256: 82758aa639c58757cf63cf52043e6394bf1322ce6051d9291b4ccbb23b8f9a84
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://crophysi.ru/aws?utm_term=desde+el+jardin+libro+completo+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374368/normal_6036e2c46a2c8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388052/normal_600343aa99f00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424997/normal_601186557c600.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406820/normal_5ff28151edd55.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452618/normal_5fe111e6646fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417523/normal_6020cd9d49b59.pdfIn PDF document text
    • https://lusenivusimutom.weebly.com/uploads/1/3/4/8/134887898/67891d8cb2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421614/normal_5ffd8351cadb0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471686/normal_600020498c87f.pdfIn PDF document text
    • https://dosijusesuxola.weebly.com/uploads/1/3/4/3/134305349/4097561.pdfIn PDF document text
    • https://vubufogos.weebly.com/uploads/1/3/4/7/134766152/wozozokorup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381101/normal_5fd903fd0c446.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426944/normal_60212ec0397f4.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/4de6faa0-8034-48bb-b7d7-f7c3a94313a4/wujikizigopoxevudawijagok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ff4002a-582d-4c83-8f73-f6dfbd1f44a8/61876753340.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bb68bec-91ae-4c76-8692-9f2246a60f1c/subject_and_object_pronouns_quiz_grade_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4789c4be-ea80-480b-9fd5-3f29fe5fa87a/xuxerugafusas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d59a44c-0ea8-4e47-a96d-de0b299163dc/us_army_reserve_jobs_in_puerto_rico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c81b1c7-02fa-4800-8b95-9f14462063dc/brother_printer_wont_connect_to_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66cd93fe-8105-48e0-b2b0-9e54e16b37c7/what_pokemon_does_red_have_in_lets_go.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a90f075-306a-41de-bd1f-370701dc6c87/segugel.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001197d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197D 5516 bytes
SHA-256: f96b0f3641098af9c1eecf10b98491578b62ce1f6c802b044e47184749e29c92
font_01_sfnt_off00012c2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C2B 11392 bytes
SHA-256: 9edc033e828be90922dd7c1b357e4045326e591ffe9b4526a373d8943f3499c7

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