Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f41bc89a70d625c…

MALICIOUS

PDF

102.8 KB Created: 2021-03-07 00:13:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9c10dc852fd1b9e3e75781bc64be899c SHA-1: a44b8869173fc3b7e73c86096edfe4b57fad5858 SHA-256: 7f41bc89a70d625c16d2520cd5ae48ae09765a2f0bd0fd04175ffe5699e194d6
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan-like behavior. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The document body, though heavily obfuscated, appears to be a lure related to 'shared value'. The presence of external URIs and the overall structure strongly suggest an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

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://pelibifir.ru/123?utm_term=the+big+idea+creating+shared+value+summary PDF link annotation
    • http://getchambre.xyz/41946391557ro5d4.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/pojimawujelelobama.pdfIn PDF document text
    • http://wwnews.site/34612803658st54j.pdfIn PDF document text
    • http://bitsracing.net/14294147651iud16.pdfIn PDF document text
    • http://naturebiolog.fun/ziretetap5glj.pdfIn PDF document text
    • http://xawegap.mywebcommunity.org/notifivumeferema.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365570/normal_601bd1d06be85.pdfIn PDF document text
    • https://vujexuxifu.weebly.com/uploads/1/3/0/7/130739824/2548204.pdfIn PDF document text
    • https://bodonovovo.weebly.com/uploads/1/3/1/6/131607174/00c7c5336f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416792/normal_602fc7098ab56.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379500/normal_600545fa81513.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://667b589a-70dd-4c78-a03f-47f6e9f07b1f.filesusr.com/ugd/db80c5_25a66b488d254b25908e2baeed711c29.pdf?index=trueIn PDF document text
    • https://aa6d2f86-95e2-42cc-897e-6bbd71c3a116.filesusr.com/ugd/78daac_d2c924c9c6b84f62a78350329b1a4bf6.pdf?index=trueIn PDF document text
    • https://58552d80-c20c-4e4f-99b9-91bedbcc07a3.filesusr.com/ugd/c18496_008de799ea7746ae9d1dcd928466d8c3.pdf?index=trueIn PDF document text
    • https://ff0b3df2-dc61-4aeb-9024-93fa9b5bc175.filesusr.com/ugd/aa14a9_7ecbd26f58fa41b98ee19bcc29b21b4f.pdf?index=trueIn PDF document text
    • https://8eeb1f0a-0cdd-4c66-98a4-83777b49fb54.filesusr.com/ugd/64f9d2_db532bca79dd47f1970ef6c5b491df00.pdf?index=trueIn PDF document text
    • https://a8a2d6b8-6248-42a0-90a4-e25e421c2e59.filesusr.com/ugd/f63f29_26d8587c896444d5837b4cbaf64999f7.pdf?index=trueIn PDF document text
    • https://e1eccfe9-8888-4f52-a155-e9c8e84e0752.filesusr.com/ugd/4fb05f_55f365557e714f3abfa309650e40301b.pdf?index=trueIn PDF document text
    • https://c6111751-42b6-464f-a8b1-832d492ff999.filesusr.com/ugd/3d0627_aa080cd9dec14115aa997e376485b35b.pdf?index=trueIn 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_off00015406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15406 5604 bytes
SHA-256: 5ec10670393add4ac3a4d04498544d91fb81a7439b6091af544da6b5d1f34d8d
font_01_sfnt_off000166f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166F1 11360 bytes
SHA-256: ad5e57a2e590f6aa05f34e10874d4ea8d2914a29100156442e43dfcface50467