Malicious PDF — malware analysis report

Static analysis result for SHA-256 d157f00ae605443f…

MALICIOUS

PDF

82.2 KB Created: 2021-03-30 14:44:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2492b940063e640573341e3d36194d83 SHA-1: 404551b018d68b33c279a60c643d96380c7982fd SHA-256: d157f00ae605443f870bf0047cd29f6bc48925561f9b1f7c2861d27092347698
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to SEO-optimized content, suggesting a link farm or scam operation. The primary external URI points to a URL that appears to be part of a phishing or scam campaign, using a lure related to 'law of attraction for love pdf'. While no scripts were explicitly extracted, the PDF structure and extensive external linking are indicative of malicious intent, likely to redirect users to malicious websites.

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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://resalured.ru/award?keyword=law+of+attraction+for+love+pdf
    • https://fawimerena.weebly.com/uploads/1/3/4/6/134630635/foger.pdf
    • http://obzorov.site/mezileguvimclqs.pdf
    • https://tetufimaburovi.weebly.com/uploads/1/3/4/0/134098130/14d9a49.pdf
    • http://24goodstore.site/34333184150ffl0h.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/1c164e11-3376-4ca4-b0c6-9237cb0d3aaf/muripipiwojefalapiji.pdf
    • https://1923692e-f727-4f58-80a8-3583160180e3.filesusr.com/ugd/c4ccc4_283f18bb513b4fd895170f03117d72a6.pdf?index=true
    • https://s3.amazonaws.com/jazuravazaguz/90324935087.pdf
    • https://b20aee1f-b1b7-4e4e-be5e-d884e4ece670.filesusr.com/ugd/10e3af_d346f6d2bbc340c3b42f4661bb9c58a7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/16fb374a-779d-4860-999e-496ed0f2d55d/97625136980.pdf
    • https://uploads.strikinglycdn.com/files/b301bdfa-842e-4b18-b570-014ada0124be/46817365418.pdf
    • https://77701ba7-c5ad-4750-ab17-5b03548f7fc0.filesusr.com/ugd/9a242c_8c7c776ac15644a4954231aa81465aa6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/65e29fb2-fe79-49cf-8881-6183fa047e3b/xiserod.pdf
    • https://uploads.strikinglycdn.com/files/27a54188-14b8-4fcf-bda6-a2c35a826448/a_series_of_unfortunate_events_movie_age_rating.pdf
    • https://uploads.strikinglycdn.com/files/f8a2babb-2209-4a95-be12-72b535064b93/how_to_record_dividend_declared_journal_entry.pdf
    • https://uploads.strikinglycdn.com/files/a9d904e5-5fd0-4632-8595-951cbffedc08/sebubolujeboluvakufamapa.pdf
    • https://uploads.strikinglycdn.com/files/5138ba34-65a2-4a40-9ed6-9da68885faa7/ropumijaxevivugabasalil.pdf
    • https://s3.amazonaws.com/boxalewijim/how_to_make_a_flamethrower_at_home.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f623.bin
d955bb6e7bc65393fee38e0204d68322fd35f550a002d768c5d21b779a36a698		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF623 4852 bytes
font_01_sfnt_off000106c5.bin
a5c7e37f63a553817149c845c6cdfd10520d0c7d672cf238a8e2688ab3c9381e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106C5 10964 bytes
font_02_sfnt_off00012c2e.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C2E 4324 bytes

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