Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d8c2bd210466082…

MALICIOUS

PDF

77.8 KB Created: 2021-05-18 03:49:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 1ef3125a4281991d3ed6e2eedd89bdc5 SHA-1: 6b6fddf0697877059a8f68a5ccd4cd2b57785264 SHA-256: 6d8c2bd2104660827d76b21de951e44ff9335773401e5fe142d950c0b2ce5972
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, a technique often used for SEO manipulation or to direct users to malicious sites. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to redirect users, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • 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://ponafet.ru/strik?utm_term=how+to+teach+main+idea+and+supporting+details PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4443802/normal_5fe12899a64d7.pdfIn PDF document text
    • http://pumeputokamodo.22web.org/tatitinokago.pdfIn PDF document text
    • https://kaledawuvilef.weebly.com/uploads/1/3/4/7/134727412/e4daebb.pdfIn PDF document text
    • https://jerejadudet.weebly.com/uploads/1/3/0/7/130738914/8720637.pdfIn PDF document text
    • https://butusokusumowa.weebly.com/uploads/1/3/5/2/135294155/6716789.pdfIn PDF document text
    • https://varudigenaka.weebly.com/uploads/1/3/4/5/134597471/pekijuliku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386076/normal_6039b31d164cf.pdfIn PDF document text
    • https://vamotavobepud.weebly.com/uploads/1/3/1/4/131438348/5428062.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501962/normal_603f0c42b5dcc.pdfIn PDF document text
    • https://sivipamekan.weebly.com/uploads/1/3/2/6/132682587/7992c291acf9c51.pdfIn PDF document text
    • https://vaxovuxaso.weebly.com/uploads/1/3/3/9/133997441/7af2de3.pdfIn PDF document text
    • https://manoduxasef.weebly.com/uploads/1/3/4/0/134041035/wozedo-lozezikesoz-zukodupuzuk-pelalixoj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366407/normal_5ffbd141591af.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/cartoon_hd_latest_version.pdfIn PDF document text
    • http://wipidomi.rf.gd/nutrition_through_the_life_cycle_7th_edition_citation.pdfIn PDF document text
    • http://pozibeborajifo.epizy.com/instrumentation_amplifier.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/aghorastra_mantra.pdfIn PDF document text
    • http://narolojekidutaj.rf.gd/current_affairs_2020_quiz_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/kikuvuzabuv.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/lomugewetimuxadodon.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/kimesozekuderokekidaver.pdfIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/decimal_to_binary_conversion_examples_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wewiro/wawazotumivi.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_off0000eef5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEF5 5540 bytes
SHA-256: 4fb021858534df548e247110d1f14260c1ba59ec8c9d1f8638b1c4a9ad3bdb72
font_01_sfnt_off000101ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AD 11084 bytes
SHA-256: 576fdd3393f8048364b1fdef12d23792be872d3344810cc8ed7daf7c3456e298

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