Malicious PDF — malware analysis report

Static analysis result for SHA-256 72df80bdda43b9ac…

MALICIOUS

PDF

150.4 KB Created: 2021-05-29 10:26:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 07215a462b7b0dfd88e9fffb731a1a44 SHA-1: 6ced2ff999d6d9b28d315b212b16d20124325aed SHA-256: 72df80bdda43b9ac36b26e6f5533b8ff8d6fcdfc90f29eb65294427188f21a48
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates it contains numerous links to disposable hosting domains, suggesting a phishing or malware distribution campaign. The embedded URLs further support this, pointing to external sites that are likely part of the attack infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://dafemum.ru/123?utm_term=formazioni+sportmediaset+4+giornata PDF link annotation
    • https://sizegetode.weebly.com/uploads/1/3/4/3/134309939/a886a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495264/normal_6023b830f1dd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421339/normal_606ae1c27e6f2.pdfIn PDF document text
    • https://dinofewujib.weebly.com/uploads/1/3/1/3/131379591/a9d028088a7183c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394071/normal_5feeafbdbb1ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482403/normal_6003c8b65317f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388169/normal_604458f123a7d.pdfIn PDF document text
    • https://wevapagavum.weebly.com/uploads/1/3/4/3/134306171/litisawepomenav-mikowos.pdfIn PDF document text
    • https://lapefobok.weebly.com/uploads/1/3/4/6/134663543/fibebujenafixitotom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387715/normal_5ffe71af0ff23.pdfIn PDF document text
    • https://niwejipudid.weebly.com/uploads/1/3/5/3/135383293/rebewuvevuxofamo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409394/normal_6051af90577d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380522/normal_5fe82601747a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496151/normal_60298faad5e95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467287/normal_60411d113343a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409095/normal_5ff2b0cbbba92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393362/normal_601d237e64c7d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/a6425133-bb84-497e-88f2-1e9ac0979248/how_do_you_write_a_descriptive_essay_about_a_person.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afab5d27-e46a-4dad-ae2a-d5d55d7bdbec/reading_into_a_new_china_volume_1_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/793381fb-6761-4d63-897e-f339ee8f828f/why_does_seasonal_depression_occur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdf21162-5b87-4e0c-b8d3-954dc6b9494d/gikazoxedadulafukawafofup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9e47466-5615-49ee-af6a-bca5184c194f/brother_mfc_7360n_toner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e63b5af3-af1a-4486-92bd-e181c9071b39/731637998.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f03181a-a10a-45e0-9748-d2d1017bd971/97060964121.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/015f0f24-6751-4040-9254-01ceb4b43507/hamlet_act_1_summary_no_fear_shakespeare.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001fc93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FC93 5128 bytes
SHA-256: d47d71463f6b9f74d056a0392124c65221b8989b2c00d0a369a457a1edc53412
font_01_sfnt_off00020dee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20DEE 16576 bytes
SHA-256: e09a4bd2403526040b510924ea6287c971f26947e115b6e0ced4be9b1310b024
font_02_sfnt_off00023d54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23D54 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

Open this report in the interactive analyzer, or submit your own file for analysis.