Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc3197d8b0f38792…

MALICIOUS

PDF

76.6 KB Created: 2021-03-19 16:46:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7c94fb7beeeb60e04630c51e770b6ffb SHA-1: c49dd41f056bce823ab333880f55d3c0b2c55f54 SHA-256: cc3197d8b0f38792cce1ef1f53f596a1cad73a152139124cb74d872b7fe4f492
186 Risk Score

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 0.9997

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://xajibur.ru/wix?keyword=smash+bros+unblocked+games PDF link annotation
    • https://vixezikuf.weebly.com/uploads/1/3/1/3/131383943/vidurebajabujiro.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/hd702LY/35559682221.pdfIn PDF document text
    • https://sapofekotor.weebly.com/uploads/1/3/1/6/131637774/9748690.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/oAvPgcI/acrylic_nail_designs_pink_and_silver.pdfIn PDF document text
    • http://ragixanomus.iblogger.org/73886851904.pdfIn PDF document text
    • https://jiparebifipi.weebly.com/uploads/1/3/4/6/134638028/jedofinepilus_dowipugosen_sesusefufoladol_nowoler.pdfIn PDF document text
    • https://dujomujur.weebly.com/uploads/1/3/4/8/134883281/juxutagivopitotupaj.pdfIn PDF document text
    • https://cdn.sqhk.co/nixenexax/TggN7jG/12517500611.pdfIn PDF document text
    • https://dimulawi.weebly.com/uploads/1/3/4/3/134380670/a5bfec7699f789.pdfIn PDF document text
    • https://miwidikanizi.weebly.com/uploads/1/3/4/0/134016908/govaf.pdfIn PDF document text
    • https://cdn.sqhk.co/xevowuto/ig6nfji/rick_and_morty_talking_cat.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://uploads.strikinglycdn.com/files/bec8e665-dbce-4777-841a-6be6de2331a8/pewakis.pdfIn PDF document text
    • http://xeroxofebamuwu.rf.gd/63925153508.pdfIn PDF document text
    • http://bubexixan.epizy.com/ccile_mclorin_salvant_dreams_and_daggers.pdfIn PDF document text
    • http://xokudotux.rf.gd/antiarrhythmic_drugs_a_practical_guide.pdfIn PDF document text
    • https://1b3fde16-7575-45ba-b40e-8916c64185ca.filesusr.com/ugd/8874e8_ed86f115a61c47a6915681a4469f8deb.pdf?index=trueIn PDF document text
    • http://wuwepapose.epizy.com/diagrama_bimanual_formato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/328f4fc1-84be-42da-a526-8ddcaed54cea/lord_of_the_rings_castle_toy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/708a0a53-d90f-450c-9500-38614136d766/fizuregawuvarezidizu.pdfIn PDF document text
    • https://bd15da75-ee01-4ad3-8b22-4778d9929f37.filesusr.com/ugd/1abc29_405448e4b9084ca4be4ba7e83f77f7cb.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8D 5416 bytes
SHA-256: 335003d2eac29410f7a97d0c05720662e808a0952069a11317c01408849f8830
font_01_sfnt_off0000f0b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B3 11620 bytes
SHA-256: ccc8723fce1e622f8486ff2646f7992e6b168bd4cdf82de4a99ad160a13574d9
font_02_sfnt_off0001174b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1174B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378