Malicious PDF — malware analysis report

Static analysis result for SHA-256 4074affcc2e94727…

MALICIOUS

PDF

43.5 KB Created: 2020-03-29 01:58:40 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 8d90dc5d82fc60f3cabd8a97abc09ed8 SHA-1: 201e9cb4d7939aa8070e0e172505e05ab4247166 SHA-256: 4074affcc2e9472742d2966d03e5e963ecdefbce166bb186901a3b8347d26666
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or SEO manipulation tactic. The embedded document body text, though partially corrupted, contains a URL that is also present in the list of external links. No scripts were extracted from this sample. The primary attack pattern appears to be directing users to a large number of external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 http://queermainehealth.org/uploads/1/3/0/7/130775355/130775355.html#515+hinton+james+drive+chapel+hill PDF link annotation
    • http://wealthbowls.com/uploads/1/3/0/5/130589070/9247579.pdfIn PDF document text
    • http://nelsonkimeofficial.com/uploads/1/3/0/4/130483981/jokurug_kididavotan.pdfIn PDF document text
    • http://ontherolljoplin.com/uploads/1/3/0/4/130489776/0d02483799845f.pdfIn PDF document text
    • http://clarksontherapy.com/uploads/1/3/0/6/130620986/fec9f5fac6.pdfIn PDF document text
    • http://seafoamsoaps.com/uploads/1/3/0/7/130739348/3068895.pdfIn PDF document text
    • http://iresearchnetwork.net/uploads/1/3/0/9/130969308/57295.pdfIn PDF document text
    • http://duckponics.net/uploads/1/3/0/6/130605254/duziv_zedalu.pdfIn PDF document text
    • http://innerkeyhypnotherapy.com/uploads/1/3/0/6/130620783/966037.pdfIn PDF document text
    • http://creativwork.net/uploads/1/3/0/6/130604423/fonek_zaguw.pdfIn PDF document text
    • http://angel-blinds.com/uploads/1/3/0/6/130621867/f453364629fd.pdfIn PDF document text
    • http://jtdlandscapes.com/uploads/1/3/0/3/130324005/6213896.pdfIn PDF document text
    • http://solutionsfocusconsulting.com/uploads/1/3/0/2/130291415/9357558.pdfIn PDF document text
    • http://minervaslab.com/uploads/1/3/0/9/130969139/fejoxixokutobepesu.pdfIn PDF document text
    • http://milestonestherapygroup.com/uploads/1/3/0/7/130775017/3d0dad913e.pdfIn PDF document text
    • http://stewarthealthresourcesolutions.com/uploads/1/3/0/2/130287988/73e84.pdfIn PDF document text
    • http://yabber.biz/uploads/1/3/0/3/130313069/fejekameweba.pdfIn PDF document text
    • http://bonfiremediastrategy.com/uploads/1/3/0/7/130776245/4005242.pdfIn PDF document text
    • http://blantonpropertypreservation.com/uploads/1/3/0/8/130874252/6383967.pdfIn PDF document text
    • http://phillipsburglutheran.com/uploads/1/3/0/6/130605216/rorodupumubabovukol.pdfIn PDF document text
    • http://64-160-90-241.pacific-solutions.com/uploads/1/3/0/2/130274282/zenusagijegipeju.pdfIn PDF document text
    • http://organicoyartesano.com/uploads/1/3/0/2/130272377/849886.pdfIn PDF document text
    • http://leroyleslie.com/uploads/1/3/0/7/130739275/sawuwe_mididarim_pedifofij.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • https://fedoraproject.org/wiki/Licensing/LiberationFontLicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000075f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75F9 8500 bytes
SHA-256: 84880986e51eb1a6e40d1a4e8bbf2c283a54fd21369c85821c9c96ea3e4fac37
font_01_sfnt_off0000969b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x969B 2616 bytes
SHA-256: d907c570f1f8f2d62f38d7529dbf77de46ca3a1917ec53aca7a78bae59874b04

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