Malicious PDF — malware analysis report

Static analysis result for SHA-256 807f907015b6909e…

MALICIOUS

PDF

86.8 KB Created: 2021-03-03 23:57:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 60c0696de4967371b8e10cc292658be3 SHA-1: 4e0091775ee008b5e162d0cd41f7f4857e34e214 SHA-256: 807f907015b6909e8c29292e9e7c8a4f503fbe3e784d517a68e982a72d0e3def
214 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 as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/123?utm_term=how+to+change+clock+face+on+amazon+echo+show+8 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4374704/normal_60153aaf4ac1c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407562/normal_5ff453bbb74d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388818/normal_600946d56c09a.pdfIn PDF document text
    • https://votorivoxezi.weebly.com/uploads/1/3/4/0/134095847/sifogus.pdfIn PDF document text
    • https://namadifudemabum.weebly.com/uploads/1/3/0/8/130813063/3a1fe7f40398c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463809/normal_60028c0d2b4b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450746/normal_5fca7cc86bafd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459182/normal_5fe2f63c7b2bf.pdfIn PDF document text
    • https://rujijixagav.weebly.com/uploads/1/3/1/3/131383475/704ad82.pdfIn PDF document text
    • https://fejenugid.weebly.com/uploads/1/3/4/0/134016750/4318808.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404524/normal_603612cf2d9b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366034/normal_602f498167923.pdfIn PDF document text
    • https://xelipifexejup.weebly.com/uploads/1/3/4/8/134848770/sabepuluvegoxi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365576/normal_6001e726cc1e6.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/vexosafugunu/fulurejununomej.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/retirement_guide_nhs_pension_scheme.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/mokusodoratopanis.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/99430601826.pdfIn PDF document text
    • http://fawivemepogu.epizy.com/xuxiwekog.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/nidoxomawagar.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_off0001071f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071F 5300 bytes
SHA-256: 0dc7cf1bd286b867da10e6e4832967b6fdea2afb26ae3df55c093f012769e680
font_01_sfnt_off00011918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11918 10824 bytes
SHA-256: ba897c844d985f4112515890d6bedc8289180f65c2a2a7633aed55f06840a832
font_02_sfnt_off00013e13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E13 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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