Malicious PDF — malware analysis report

Static analysis result for SHA-256 73617339887e2197…

MALICIOUS

PDF

75.4 KB Created: 2021-06-01 06:10:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 341953105db1811b9855c1fc962a0859 SHA-1: 2190cc4d1d5f87b070b14703fe090c57943ca894 SHA-256: 73617339887e21974d78078784b7c7ab56072ebad307d8ed638386c7b5738e2a
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or trojan delivery mechanism. It contains numerous external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users. The primary malicious URL identified is allytemp.ru, which is likely part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://allytemp.ru/pbw?utm_term=what+size+is+a+cd+jewel+case+insert PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4426820/normal_5fcbb4d4bdb55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450345/normal_603c039260a9b.pdfIn PDF document text
    • https://xoxoxiwozolem.weebly.com/uploads/1/3/0/7/130739626/c5561af523d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453729/normal_6036bff4573a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447280/normal_5fe9514fcda9f.pdfIn PDF document text
    • https://gawotajar.weebly.com/uploads/1/3/4/5/134525297/1a9733b6d9.pdfIn PDF document text
    • https://pawigesi.weebly.com/uploads/1/3/5/3/135389203/c6918.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404750/normal_5fecfa1263815.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/61505163-9f7e-43b7-b050-d66a106a0203/63460198787.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f9ec155-4459-4593-a44d-0d8be47f6c30/who_is_darth_banes_master.pdfIn PDF document text
    • http://zeladejan.pbworks.com/w/file/fetch/144442704/30436384955.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d9ae72e-c23d-4be8-a2c3-15911fe8e75e/55554405930.pdfIn PDF document text
    • http://jozeluwofe.pbworks.com/f/42232834757.pdfIn PDF document text
    • http://supatibu.pbworks.com/w/file/fetch/144429066/48052726293.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/817ea1e0-8dcc-4657-8f54-e684dfa78f84/cuisinart_little_pro_food_processor_parts.pdfIn PDF document text
    • http://kipizasuzeda.pbworks.com/f/59991445059.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7bc0d6a-6b20-4111-a123-3111769e29f2/who_authored_the_five_proofs_for_the_existence_of_god.pdfIn PDF document text
    • http://pezeliv.pbworks.com/f/79475037632.pdfIn PDF document text
    • http://letonepamusi.pbworks.com/f/how_to_get_elder_achievement_cookie_clicker.pdfIn PDF document text
    • http://visetululiv.pbworks.com/f/fijolasefozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2d17b71-1415-4faa-910c-d57cc17e0409/60746309218.pdfIn PDF document text
    • http://xojifot.pbworks.com/f/fufabo.pdfIn PDF document text
    • http://wuranosa.pbworks.com/w/file/fetch/144416061/najevamulevofo.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_off0000e9b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B0 5260 bytes
SHA-256: 8607b3b3a90ab155b333f211b5f88ad0c42231e92fb23d44fce9aa2e33a23768
font_01_sfnt_off0000fba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA4 10744 bytes
SHA-256: 049b1a2bbdbbd295ad903a64885fa73013f2c503004613279d2cd81cf84de6ea