Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab3e447fa3f26b2a…

MALICIOUS

PDF

71.7 KB Created: 2021-02-19 13:37:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c8a626a45d42c415a7a98a8202cf5847 SHA-1: 30e260775718028326a764a2504fe5c4ba89a16f SHA-256: ab3e447fa3f26b2a641fd5be3b52695b5d7ea24ee39f2ca9f87ba3c4abcee44c
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://bologen.ru/wix?keyword=finding+slope+from+two+points+word+problems+worksheet PDF link annotation
    • https://pebiname.weebly.com/uploads/1/3/1/4/131453048/genixulazebumo.pdfIn PDF document text
    • http://spindlndou.space/vepigumoxezonudileponirhj.pdfIn PDF document text
    • http://intekzafast.online/napeti8x5cx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483359/normal_6006cc34e92e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374207/normal_6028aa28652b4.pdfIn PDF document text
    • http://igclienteam.com/wow_classic_herb_leveling_guide7utfw.pdfIn PDF document text
    • https://pusosisuko.weebly.com/uploads/1/3/6/0/136094517/zolawitizirozu_lovitotetuj_bojem.pdfIn PDF document text
    • http://mantenancie.com/christmas_puzzlesjudui.pdfIn PDF document text
    • http://pubgucbayim.com/graphing_bivariate_data_worksheetpdz79.pdfIn PDF document text
    • http://proita.fun/72342479759oq4ik.pdfIn PDF document text
    • http://pifafuvutote.iblogger.org/brookstone_digital_wireless_tv_headphones_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dominomufu.rf.gd/cad_blocks_free_bathroom.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/29745915297.pdfIn PDF document text
    • https://s3.amazonaws.com/bogeguva/83931652117.pdfIn PDF document text
    • https://s3.amazonaws.com/xulikamul/interculturalidad_definicion.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/91868502382.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2C 5496 bytes
SHA-256: baf662457dd50b0b6cb61ad3910354e305d66ff5dc9dd7cf0117d098e95daf94
font_01_sfnt_off0000edcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDCD 9960 bytes
SHA-256: 912eab8e08b8d7a061a92ff7dd3ca6ab048f30b96e5f56f7ce3e3c4322402f95

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