Malicious PDF — malware analysis report

Static analysis result for SHA-256 785dc077664b43a3…

MALICIOUS

PDF

80.2 KB Created: 2021-04-07 23:26:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2f37e21be60b4c95e796023ca6d9fc0f SHA-1: d94b692c685ec178e97f6acfb0ee4dc73cb79cc7 SHA-256: 785dc077664b43a3bc13a3480265fdc8d1ae2127f0b3142bbae473bf916cc0a2
186 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 by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://druttle.ru/strik?utm_term=who+plays+sam+i+am+in+green+eggs+and+ham PDF link annotation
    • https://mojoranazo.weebly.com/uploads/1/3/4/4/134403481/varupizaribi.pdfIn PDF document text
    • http://brumbum2.xyz/46634350851wpcy.pdfIn PDF document text
    • https://laregupofonel.weebly.com/uploads/1/3/4/4/134464195/2106591.pdfIn PDF document text
    • https://xaxibilezulaf.weebly.com/uploads/1/3/4/0/134096047/cd5fdaa4f.pdfIn PDF document text
    • https://vivifaxokuz.weebly.com/uploads/1/3/4/5/134511129/1223234.pdfIn PDF document text
    • https://cdn.sqhk.co/govizanorev/hijjtGD/93212983851.pdfIn PDF document text
    • https://cdn.sqhk.co/fofodafexadu/6WjdijD/the_guilt_trip_movie_review.pdfIn PDF document text
    • https://kaledawuvilef.weebly.com/uploads/1/3/4/7/134727412/7221008.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482406/normal_5fe216488a06f.pdfIn PDF document text
    • http://smartradiobf.ru/how_to_become_a_medical_interpreter_in_nyc2l5bt.pdfIn PDF document text
    • https://jibabarudemafe.weebly.com/uploads/1/3/4/7/134748102/9306934.pdfIn PDF document text
    • https://xudekumuf.weebly.com/uploads/1/3/2/6/132681038/tenotavo.pdfIn PDF document text
    • https://ziwagugo.weebly.com/uploads/1/3/4/1/134131511/335c068c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421468/normal_605461d34c04c.pdfIn PDF document text
    • https://cdn.sqhk.co/zewapoxi/gjFWjdp/dice_and_slice_chopper.pdfIn PDF document text
    • https://jabuvevakeg.weebly.com/uploads/1/3/4/6/134685488/napos.pdfIn PDF document text
    • http://lnstagram-blue-ticks.com/what_are_the_12_steps_in_overeaters_anonymousvhb2v.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/69418795780.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/how_to_connect_virgin_pulse_max_buzz.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/allure_by_broan_range_hood_light_bulb_removal.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA26 5488 bytes
SHA-256: 6c4c1552f19f13edd2e6f0bbdba4ad81313a005f144c4e824b4d4aa380994ca2
font_01_sfnt_off00010cb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB9 10828 bytes
SHA-256: 28feef58d8c076bc4677e4774b82fdafe311deb9364edaf0747dbf66619bd7f2

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