Malicious PDF — malware analysis report

Static analysis result for SHA-256 81a621b5103006f5…

MALICIOUS

PDF

68.4 KB Created: 2020-12-17 10:02:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 233fad216e255e07bd0ac297cf03e62f SHA-1: bf7e8d5a81b56281be5943927fb60b9be5469e88 SHA-256: 81a621b5103006f5018faab196841e7ff510572b6afba665e089e2286f327f22
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffking.ru/123?utm_term=case+of+galaxy+grand+prime PDF link annotation
    • https://jikigalogadod.weebly.com/uploads/1/3/4/6/134647375/kegoxuso-vawopiwi-gamaxevuvufuguj-rilafomug.pdfIn PDF document text
    • https://xanugobolenaz.weebly.com/uploads/1/3/4/3/134371028/vuwesiralovoguxo.pdfIn PDF document text
    • https://tatabano.weebly.com/uploads/1/3/4/8/134850833/94295a.pdfIn PDF document text
    • https://zitavumerut.weebly.com/uploads/1/3/4/4/134465292/gitaxaxijaviro-gusaduvidu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381978/normal_5fae050b8f424.pdfIn PDF document text
    • https://kagivosivozavex.weebly.com/uploads/1/3/4/7/134746508/rofiwoveralapuf_lukoge_nekijosuwog.pdfIn PDF document text
    • https://ribijiwazafi.weebly.com/uploads/1/3/4/8/134881841/6551674.pdfIn PDF document text
    • https://dumiwexadanona.weebly.com/uploads/1/3/4/5/134522913/1449968.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483610/normal_5fac2ac9168bf.pdfIn PDF document text
    • https://nunevebola.weebly.com/uploads/1/3/4/8/134846747/2464180.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/sifukisivud-kalaligitakep-sinefolofuzuwit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475987/normal_5fd102467dec4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc0c3cd92c50b1a1e76da16/t/5fc0d7b73f75b16643f3b3fb/1606473655998/57241781075.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14482a35-15d5-4f4c-80f8-16d81121f25b/megipulowosemaforisub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70a77ea7-66e9-44a2-89b4-dc2a396ddd41/40670108883.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC038 5264 bytes
SHA-256: d749170b755713f49fbd884f6113d40755cc3ad42884bd62083ef85b61cf6cff
font_01_sfnt_off0000d20a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD20A 10716 bytes
SHA-256: 9f6e2eab8a8acd5457b5184a7e6c3d8b3fe1062c4796e48a6cca62e2734233aa
font_02_sfnt_off0000f6b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B7 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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