Malicious PDF — malware analysis report

Static analysis result for SHA-256 36ef44f9d79ecb21…

MALICIOUS

PDF

34.3 KB Created: 2020-10-02 22:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 7f94343e1b7a3f4428aa9355a403725b SHA-1: 13594071ccd37949753da24aff09ca7625a62f56 SHA-256: 36ef44f9d79ecb2183b05e27cf3f7e68cd8b694e934a0c8cf26453afd88d87de
164 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://ggtraff.ru/strik?keyword=fallout+4+stat+calculator In PDF document text
    • https://site-1040683.mozfiles.com/files/1040683/nobuwuvabowelefelujobo.pdfIn PDF document text
    • https://site-1038432.mozfiles.com/files/1038432/vekapabedomam.pdfIn PDF document text
    • https://site-1038634.mozfiles.com/files/1038634/15772627143.pdfIn PDF document text
    • http://vatawi.ninemilechurch.com/uploads/1/3/1/4/131437849/f57cf0f2.pdfIn PDF document text
    • http://fojuvuka.farmersdaughtersk.com/uploads/1/3/2/6/132695240/zufisavazipodew_nesazatutoj.pdfIn PDF document text
    • http://pelip.utkcru.com/uploads/1/3/0/8/130874038/timolakofomu-zinubuxoniwisu-ruwexixo-tesip.pdfIn PDF document text
    • http://puxeme.japanischerweihnachtsmarktberlin.com/uploads/1/3/1/0/131070382/5742091.pdfIn PDF document text
    • http://namokige.airtreknorth.com/uploads/1/3/2/6/132695388/90dec9.pdfIn PDF document text
    • https://site-1041583.mozfiles.com/files/1041583/1981226081.pdfIn PDF document text
    • https://site-1038311.mozfiles.com/files/1038311/jixogasezudopasarizu.pdfIn PDF document text
    • https://site-1037010.mozfiles.com/files/1037010/raxuxesozalidegisu.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/6ef90441-3dfb-4e7b-833c-93ba5300c000/42334120648.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0b4d98b-35b0-47ff-af1b-adf7511cd8a9/fufenajosaxaso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50b768bb-bb91-4283-87df-5a7164c2a40d/74529436055.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/321cb757-e058-47d1-ad44-a159695426bc/mofotukuzugemonif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8363b102-cb90-4644-bae7-8bcf6742f43a/78158902066.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

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_off00004a5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4A5D 4836 bytes
SHA-256: eb4cdb221a32c545e643cd16629ed951ff7ad21436804e75ab42daf17ab72198
font_01_sfnt_off00005ae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE0 9844 bytes
SHA-256: dd79c6ce42bca7a809e6ad1f78296ad938fbf9f18092662e3a92abf917cb4dc0

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