Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8eef3218090b056…

MALICIOUS

PDF

82.7 KB Created: 2021-03-02 20:53:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 2574edeeef46ede59649d30077317b11 SHA-1: 9dea5107c02aaa7938b887458a37cdf1bd67b45a SHA-256: b8eef3218090b0567279821d8b1e89b237b77ad087e58b2b24e4df7ef22c170c
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 ClamAV and 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 0.9996

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://jottigo.ru/123?utm_term=how+to+unlock+weight+watchers+food+scale PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4483081/normal_5fdf323073091.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366995/normal_5fede05c69f51.pdfIn PDF document text
    • http://medyahanem.com/76070226741ctrwf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387810/normal_6031c3de34ab1.pdfIn PDF document text
    • https://foguvebosep.weebly.com/uploads/1/3/5/3/135315209/56fd612bbec557f.pdfIn PDF document text
    • http://dehydratedoriginalgoodness.com/machine_intelligence_stellarisiezf3.pdfIn PDF document text
    • http://salonhq.xyz/the_last_song_full_movie_free_putlockers5r3jw.pdfIn PDF document text
    • https://pegepujime.weebly.com/uploads/1/3/1/4/131453637/sorubuxerine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480758/normal_5fd626f229423.pdfIn PDF document text
    • https://wawotisusuwo.weebly.com/uploads/1/3/2/7/132741293/ce7fd605.pdfIn PDF document text
    • http://shimano-stradic.ru/164995172767auy1.pdfIn PDF document text
    • https://kunubixofatefif.weebly.com/uploads/1/3/4/0/134096788/5919991.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453732/normal_601924a18d753.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482018/normal_6002209a9a9ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459170/normal_601eea5ae71c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475586/normal_603cca8294112.pdfIn PDF document text
    • http://damvglaz6.xyz/93544552043153j0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451757/normal_5ff02a48e173b.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://s3.amazonaws.com/pozokimepe/53371153518.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/gilujoteniguni.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/cdc_vis_sheet_for_flublok.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_off0000f7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E4 5284 bytes
SHA-256: e59af6c2de8d0a6923b78ad779a61b0db05a1cb794fd6a17b70268a77caa3633
font_01_sfnt_off000109e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E4 10828 bytes
SHA-256: ab5121f59402434f1de03599bc1c0f204da7187a56e2daa88e2af196d67566a8
font_02_sfnt_off00012f03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F03 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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