Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7d10c8e6f775b4d…

MALICIOUS

PDF

84.2 KB Created: 2021-05-06 08:41:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ecbb2ea9bf310683974408a0066baffa SHA-1: e467efc4ba6a8260a65844a17d89239fadfe34f5 SHA-256: d7d10c8e6f775b4d9ef35df27bfa0d6021df5a5d182865030a43ef9e7fe340a0
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs, with one pointing to a link farm on disposable hosting, suggesting a phishing or malware distribution lure. The presence of embedded URLs and the PDF's structure strongly suggest it's intended to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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://gimoguvi.ru/strik?utm_term=stihl+fs+55+rc+spark+plug+replacement PDF link annotation
    • https://zifosugelupoz.weebly.com/uploads/1/3/4/6/134693972/4a4f7.pdfIn PDF document text
    • https://batagokefo.weebly.com/uploads/1/3/1/0/131070859/safibekebowak_dibalozex.pdfIn PDF document text
    • http://kobopez.mygamesonline.org/kerosene_poisoning.pdfIn PDF document text
    • http://midorezif.iblogger.org/vudilifunudoxe.pdfIn PDF document text
    • https://zalozudipob.weebly.com/uploads/1/3/4/6/134673455/banosinal_jisakol_japavewu_gutif.pdfIn PDF document text
    • http://retamos.mygamesonline.org/pdf_alternator_manual.pdfIn PDF document text
    • https://jabenawonidibe.weebly.com/uploads/1/3/5/3/135385032/rixegur.pdfIn PDF document text
    • https://fugomunufu.weebly.com/uploads/1/3/4/5/134586131/3104a8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://daxepusiz.rf.gd/faith_guides_channing_bete.pdfIn PDF document text
    • http://povasapodojika.epizy.com/financial_modelling_classes_in_mumbai.pdfIn PDF document text
    • http://tujefuguxofela.rf.gd/biodynamic_calendar_2020.pdfIn PDF document text
    • https://911f1565-2faa-4874-b261-330d521e7362.filesusr.com/ugd/f46427_d84f056190fa481f9187936a71ef1f63.pdf?index=trueIn PDF document text
    • http://gixuwopafapiro.rf.gd/bomexugamopides.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/coffee_shop_business_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/1744536391.pdfIn PDF document text
    • https://9005981c-20a7-4b93-9dfe-a591c0bc6fcf.filesusr.com/ugd/afbba5_aff75506173b44a8a3c1fcce5457ab07.pdf?index=trueIn PDF document text
    • https://357b8bef-7330-4cfe-b31d-389db25c4d5a.filesusr.com/ugd/4c76bf_6aa59552d2c24fa1b8b3ceb6512f6f4c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sinadi/wozor.pdfIn PDF document text
    • https://s3.amazonaws.com/boduxatavepe/serazeseter.pdfIn PDF document text
    • http://menerolefu.rf.gd/befunky_photo_editor_computer.pdfIn PDF document text
    • http://ruvugenoguj.rf.gd/metaphorical_meaning_of_parasite.pdfIn PDF document text
    • http://zanelexi.epizy.com/govisopisekorikemud.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/lopimuvobujiv.pdfIn PDF document text
    • http://riwugenesujo.epizy.com/algebra_1_regents_answer_sheet.pdfIn PDF document text
    • http://romapubimowa.onlinewebshop.net/12354005943.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_off0001089f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089F 5720 bytes
SHA-256: 33f6fd19a905b92af2e9a1e4c16066ebd77565943e7721462fb6cefcc31210bf
font_01_sfnt_off00011bfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFA 11392 bytes
SHA-256: 7d0f83805e1ef3d6b6293f3b48038e4c6c1414e58be639c98e0a30f3952cc4cd

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