Malicious PDF — malware analysis report

Static analysis result for SHA-256 30c2875c11263b9f…

MALICIOUS

PDF

76.8 KB Created: 2021-04-17 20:21:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f54273d7ab61b529607f7f7a4059d019 SHA-1: 5b916e2da3a1e1d924eef5e2a12ae603073d2c46 SHA-256: 30c2875c11263b9f802e887fd401836364be24463e3812f16113eb7c9981d65d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. 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 0.9998

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.
  • 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://jacksth.ru/strik?utm_term=how+to+clean+pilot+light+on+gas+heater PDF link annotation
    • https://daniwevuwawudo.weebly.com/uploads/1/3/4/8/134849628/valuwizekizusiponuko.pdfIn PDF document text
    • https://geridaradekod.weebly.com/uploads/1/3/1/4/131437552/4031320.pdfIn PDF document text
    • http://antileqphh.site/lagipiat874.pdfIn PDF document text
    • http://natlab.ru/how_many_sounds_in_omnisphere_2abq6n.pdfIn PDF document text
    • https://sazulolako.weebly.com/uploads/1/3/1/4/131453808/fanifiriwitefonolu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465264/normal_603fe3ad33c47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450248/normal_601db66e45286.pdfIn PDF document text
    • https://warororob.weebly.com/uploads/1/3/5/3/135314520/sixaroviwiwugizuvot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474192/normal_600eafb26ee85.pdfIn PDF document text
    • http://ukranews.site/rowapejarumegijudalud2st6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449630/normal_602c1f836458b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://24451074-f53b-4065-993c-779ba3957988.filesusr.com/ugd/0ae25f_6180325db3c4415cbb000bd1f3d4ca56.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/best_antivirus_and_malware_protection_for_android.pdfIn PDF document text
    • https://ae0ecf71-49bb-4ac4-bba4-d0f2a20d1af9.filesusr.com/ugd/668a47_8a090165b85e4dc1b659cf0fca860e03.pdf?index=trueIn PDF document text
    • https://40ba1f7a-6e91-49bb-bbb8-dfbb40a2bc60.filesusr.com/ugd/22bf55_2400d058f41e4374a49f5216d2ecbf8e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/boss_baby_blackbird_song.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/is_it_alright_synonym.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/a_gentleman_songs_musicbadshah.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/data_warehouse_tools_free.pdfIn PDF document text
    • https://d23eb412-52e1-45ef-a32a-0c032022daee.filesusr.com/ugd/03485a_51f706a5be0749f3a994125a94596e28.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_off0000ec38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC38 5248 bytes
SHA-256: ad2a1083b6186500328864906addaea7675ef7dbb297077de236fc55518caee2
font_01_sfnt_off0000fe1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE1A 11052 bytes
SHA-256: 7a64218813ac7bd0f08c9d9c672d9a7e9a2e49d9a4046743bdcf18f0de7d7547

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