Malicious PDF — malware analysis report

Static analysis result for SHA-256 93e09d4fda869674…

MALICIOUS

PDF

89.1 KB Created: 2021-03-19 15:36:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 21e32d7c225525bf3b0ef75003e1aa64 SHA-1: b00038941559cb3d971beb5c7e71c1804d884013 SHA-256: 93e09d4fda8696744a4f9a23bb2960ac93cc032e1cf8b58eeae5939185d4a5a9
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classification and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The embedded URLs likely lead to malicious content or phishing pages, and the document's structure points towards an attempt to manipulate search engine results or distribute malware indirectly.

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://pelibifir.ru/wix?keyword=phil+spector+techniques PDF link annotation
    • http://xoziduso.mypressonline.com/diary_of_a_wimpy_kid_the_long_haul_jeff_kinney_preview.pdfIn PDF document text
    • https://rumikupim.weebly.com/uploads/1/3/5/3/135310872/navanal-rokiv-gunujo-zejemidorizogi.pdfIn PDF document text
    • http://difavusimope.iblogger.org/41386762633.pdfIn PDF document text
    • https://zodemabu.weebly.com/uploads/1/3/4/8/134896511/35d2cb60ea37ba5.pdfIn PDF document text
    • http://dinusedixiwog.iblogger.org/scientific_calculator_apk_casio.pdfIn PDF document text
    • http://sabumow.mygamesonline.org/xumukebam.pdfIn PDF document text
    • https://kofutisidizeb.weebly.com/uploads/1/3/1/4/131437743/jajiri_vojatedoz_tigud_debosa.pdfIn PDF document text
    • http://mikazuxo.mypressonline.com/kujogugexozubas.pdfIn PDF document text
    • http://pegujanixur.22web.org/63657912839.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gudugapapilile.atwebpages.com/4828472886.pdfIn PDF document text
    • https://75cc4b12-69da-4024-8422-75f9303faa99.filesusr.com/ugd/d6c222_f50d34ab5c944aa088e89016a5e93d38.pdf?index=trueIn PDF document text
    • http://kevazot.epizy.com/mujizuvugisonevisujowilu.pdfIn PDF document text
    • https://684917c6-b594-4497-9ea4-141105166a5b.filesusr.com/ugd/0dc9f5_43818bbfb8fc40d9b11f8165928e5847.pdf?index=trueIn PDF document text
    • https://20128683-61eb-4207-b985-d468b1a81fea.filesusr.com/ugd/0049ca_efe3ab5a13f748499476679ea93bc594.pdf?index=trueIn PDF document text
    • http://zilozatajixite.rf.gd/aprender_portugues_2_free_download.pdfIn PDF document text
    • http://pumonufagatoteb.epizy.com/kumawalanesa.pdfIn PDF document text
    • https://37991ae0-d72b-4ccf-bf90-288dedd591e7.filesusr.com/ugd/041b56_8eb99ab828ad4b8096fab21e4dbcdf82.pdf?index=trueIn PDF document text
    • https://626fb5af-1d67-41cb-86ce-204163677ff0.filesusr.com/ugd/9d869b_bcc2ae4d273a44bd8fd8fd912de0d95d.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011fda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDA 4936 bytes
SHA-256: d2de080547a073d4e5249405b71c8faff9ab5ba00822e011213b36391e03f20b
font_01_sfnt_off000130a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130A8 11356 bytes
SHA-256: 60c0521c2fc90a48c8af565b5d5903dc66f65dae287317f3298f2f542076f32b

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