Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d46f362add2d090…

MALICIOUS

PDF

83.8 KB Created: 2021-03-13 14:17:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 6d8d948d79168d543eeab675ad4e00f2 SHA-1: 1a530a06ff721f95f89b8ee6f5033c89ceeefb76 SHA-256: 3d46f362add2d0904511465931345ea44451991bb929afd65c725079f11b9bc1
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF that contains numerous external links, many of which point to disposable domains and are likely part of a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as phishing or a trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to deliver a second-stage payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/aws?utm_term=hunchback+of+notre+dame+disney+movie+quotes PDF link annotation
    • http://rm-swis-mine.com/the_chocolate_touch_full_bookfi8jc.pdfIn PDF document text
    • http://pixilapusir.22web.org/dazawasogajosabufisofet.pdfIn PDF document text
    • https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/gijigutin.pdfIn PDF document text
    • https://megularebenava.weebly.com/uploads/1/3/1/1/131164421/5ee52dd99f1.pdfIn PDF document text
    • http://fapseo.ru/64130349300ft9py.pdfIn PDF document text
    • http://sodaapp.pro/what_shows_are_available_on_netflix_usa5ol8d.pdfIn PDF document text
    • http://idealica-ufficialeitalia.website/vujujarubaris1z931.pdfIn PDF document text
    • http://all-system7.club/duruveworixelekaxaguwomerpdix4.pdfIn PDF document text
    • http://2020coupons.info/irobot_roomba_860_vacuum_reviewkamjc.pdfIn PDF document text
    • http://vorecan.fun/pearson_american_literature_textbookv25hz.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/9a024004-bf92-40f8-8a96-b7b9403d8f45/damodaran_applied_corporate_finance_a_users_manual_-_4th_edition_wiley.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5a40811-3ba6-4450-a0d4-414818556ac3/norcold_rv_fridge_instructions.pdfIn PDF document text
    • http://zotozonon.rf.gd/1067746910.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c3a39cb-db6a-4310-9f5a-aca9d9bfb504/75395431556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a10e31a3-4399-4160-9dfe-36ae8035fa40/voxelabo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f600176d-c156-4a0a-8c54-94ecee8f8d1d/38372898949.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df963e30-69ea-4078-9144-f4ac9381d1a8/fajorepuwabaf.pdfIn PDF document text
    • http://selofedibaxonal.epizy.com/all_bollywood_movie_old.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bad7ec19-db0e-424a-9f95-e425644ba61f/what_do_commercial_contract_lawyers_do.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ec23137-8207-49c3-a200-58b3e241e9bc/68604650639.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_off0001004a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004A 5680 bytes
SHA-256: f7edf080fd8bd76872176a0d6480714b54ade673b4fdd6de973dfe7e62c156f5
font_01_sfnt_off0001137c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1137C 14200 bytes
SHA-256: d2db695a993f1f67eb730bbbd5a4d5ef80049e2581137b77fa4b9f47ea37b1df