Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e8a2e9a91242fe3…

MALICIOUS

PDF

78.1 KB Created: 2021-03-29 08:25:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d5e8f3b1e8d949ef2a7721d40fda3cb8 SHA-1: 18678bd673b7b0596f6f8c4e5e547ce69fac0593 SHA-256: 1e8a2e9a91242fe3ab531a5604b9778aa43e57b828c3a303380551aaf2e33f1a
186 Risk Score

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 0.9997

Heuristics 6

  • 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.
  • 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://crophysi.ru/strik?utm_term=2012+dodge+durango+crew+owners+manual PDF link annotation
    • http://creamwalls.space/what_are_the_two_types_of_emotionsh4u20.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420587/normal_5fc579d87c251.pdfIn PDF document text
    • http://italysummer.fun/44144010124t3w7n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417413/normal_600a17ffb1088.pdfIn PDF document text
    • http://novofikupeneda.mywebcommunity.org/40633128197.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469828/normal_60520f110034b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471703/normal_60250a2aabc1f.pdfIn PDF document text
    • https://mokoxobijukox.weebly.com/uploads/1/3/4/3/134321678/vapevaxifopotaje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416504/normal_604b5619b9c50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453105/normal_600fd22bf3d21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422876/normal_60256766d7149.pdfIn PDF document text
    • https://letazofuwukuge.weebly.com/uploads/1/3/4/8/134869061/sagizozod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427783/normal_6014c8a397d34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370268/normal_6017b48c58954.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/27c2299c-75c4-4f3a-879e-26ee4233a0cc/xuronidukuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7deb1794-f992-49b9-83f8-e77391a1286b/jamigonakekojoka.pdfIn PDF document text
    • http://vesedakowata.onlinewebshop.net/the_broaden_and_build_theory_of_positive_emotions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/625f3a3e-05a9-4c5c-80d8-acb7f9010421/i_am_not_perfect_im_original_meaning_in_marathi.pdfIn PDF document text
    • http://kepagewav.atwebpages.com/punalufelaniru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00484cbd-2be0-4ad4-bb02-5ae1911e2f00/how_to_be_a_top_student_in_university.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d94496e8-f764-476f-a2c4-d63a7aa651cf/xabekuxexagu.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_off0000f127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF127 5580 bytes
SHA-256: 83e43b2be0b9e49f2d3218d0c3069915e1208d3c0a693d48feed915f43a3da5b
font_01_sfnt_off0001041f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1041F 11340 bytes
SHA-256: afcca3047bc442906fb9ca5b64aec619c2dc5e32fb295e4f02ac233b9a1fd432