Malicious PDF — malware analysis report

Static analysis result for SHA-256 e49e8313936ef411…

MALICIOUS

PDF

80.6 KB Created: 2021-03-23 13:36:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: acabf0126c2c6f6cc1785b484b1dcfd6 SHA-1: b1de598962bb2d1495a2c4bcb2bb8477ce91a60c SHA-256: e49e8313936ef411d22140c9b2d7b625c98e6d366b6bb314321a9f117c0dc73c
186 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 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/123?utm_term=chaska+full+hd+video+song PDF link annotation
    • https://pufoputinagof.weebly.com/uploads/1/3/4/2/134234879/vewozevep_vasama_jitipixo.pdfIn PDF document text
    • http://tiwimifozukimu.medianewsonline.com/farsi_language_course.pdfIn PDF document text
    • https://vovasodakujex.weebly.com/uploads/1/3/0/8/130874601/kokuvofo.pdfIn PDF document text
    • https://rabugotekinevod.weebly.com/uploads/1/3/1/8/131871666/tibodisofemit.pdfIn PDF document text
    • https://pufetebad.weebly.com/uploads/1/3/4/7/134711346/5368616.pdfIn PDF document text
    • https://babidunilatejob.weebly.com/uploads/1/3/4/2/134266015/854c1a8.pdfIn PDF document text
    • https://rumodabumuxe.weebly.com/uploads/1/3/1/8/131857513/vulipido.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/new_york_magazine_crossword_puzzles.pdfIn PDF document text
    • https://ac4cd5cf-e861-4b1b-a585-e47049f737a6.filesusr.com/ugd/843280_efdf8d268ed44ba28e91aaf728c7bc8b.pdf?index=trueIn PDF document text
    • https://8dfd47f4-e591-4377-92a3-bdbf91d41e5a.filesusr.com/ugd/a58b01_7fc5138e81bb458a9fa24ae42dddd0b1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/85d22884-d290-4888-9d0f-529971717caa/why_90_days_sober.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/gerasuvaxevogaben.pdfIn PDF document text
    • https://77047a80-9f17-4504-a563-a097c25ca12e.filesusr.com/ugd/5c8b2f_41fc12612e9e4d36a072982e5e2c400b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5e08186-2734-4c9e-87f0-690f96adf25e/gps_garmin_62sc_software.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/34227395126.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/fopuw.pdfIn PDF document text
    • http://wikukodukoja.onlinewebshop.net/pathfinder_2e_bestiary_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3ebcac6-81e0-411c-a67f-15a04fa2ca59/64495221121.pdfIn PDF document text
    • https://c6111751-42b6-464f-a8b1-832d492ff999.filesusr.com/ugd/3d0627_8c1eb72fd4924458b4a6eb24d2f1abb7.pdf?index=trueIn 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_off0000feeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEB 5104 bytes
SHA-256: 52dd60b90874b59a7582eff990f1b4a71a9387a18ed6014a34268a3d6ac2bb02
font_01_sfnt_off0001104e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1104E 10744 bytes
SHA-256: af34c66ddc67a8319a37a137aefe9b6fa52df75b8cfb42dbf7f6e14ad5e44612

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