Malicious PDF — malware analysis report

Static analysis result for SHA-256 70877e44bcacd2ee…

MALICIOUS

PDF

87.1 KB Created: 2021-04-14 06:55:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 41586fb7c63635cef009ae16b5021426 SHA-1: d5983d81724e2700bcdb86d13eec336faed60ceb SHA-256: 70877e44bcacd2ee7881fc818aeb8b6d0e731d12915fc0571fb55f32295650fc
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to disposable domains and redirectors, indicating a link farm designed for malicious purposes. The document body, though heavily obfuscated, contains text related to movie streaming, which serves as a lure. The presence of PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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.
  • 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://crophysi.ru/strik?utm_term=jack+reacher+never+go+back+full+movie+stream+free In PDF document text
    • https://femodamokej.weebly.com/uploads/1/3/4/5/134529999/buritazuviwofi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420240/normal_600bf5156c164.pdfIn PDF document text
    • http://lawexape.mygamesonline.org/body_planes_and_anatomical_directions.pdfIn PDF document text
    • http://geparup.scienceontheweb.net/molecular_genetics_books_free_download.pdfIn PDF document text
    • http://zavolofa.mygamesonline.org/neneka.pdfIn PDF document text
    • http://digosige.mywebcommunity.org/new_yorker_crossword_answers_century_21.pdfIn PDF document text
    • http://zevibeponakat.getenjoyment.net/nodiwiforeti.pdfIn PDF document text
    • https://mogudigadoto.weebly.com/uploads/1/3/2/6/132695399/c3f1b3c9aafd.pdfIn PDF document text
    • https://ferowadamo.weebly.com/uploads/1/3/4/5/134593689/8779dba32c3.pdfIn PDF document text
    • http://medazuxa.mywebcommunity.org/meningitis_bacteriana_en_recien_nacidos.pdfIn PDF document text
    • http://datovufes.scienceontheweb.net/meaning_of_bounded_rationality.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379474/normal_6025f1d262e88.pdfIn PDF document text
    • https://xexemisekugo.weebly.com/uploads/1/3/4/6/134679242/814c30.pdfIn PDF document text
    • http://parazepurafeza.medianewsonline.com/dabubunezaj.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
    • http://wimifus.rf.gd/chrome_2019_apk.pdfIn PDF document text
    • https://9042e326-c85f-44e6-b9b6-0c206471fdba.filesusr.com/ugd/0d2fda_121a24b437624a978113f2cee20eecb8.pdf?index=trueIn PDF document text
    • http://bevivex.rf.gd/numipewuvajaponosomadof.pdfIn PDF document text
    • https://7fca5364-97a1-4441-b76e-d2c429a59218.filesusr.com/ugd/735424_980252d601d5487abab4d69e84db49c8.pdf?index=trueIn PDF document text
    • http://mirijevedot.epizy.com/fotubuxekavoted.pdfIn PDF document text
    • https://7fd672c9-0ac8-42d3-9d3c-9ebb2fbea2b4.filesusr.com/ugd/92785a_9fde0acffc9b415d87ef40b3af1dc0d8.pdf?index=trueIn PDF document text
    • https://50bf384a-eeac-4f26-a262-e2ba1a5e00ba.filesusr.com/ugd/17159d_9917f54f23844ca28cb18f438c59f381.pdf?index=trueIn PDF document text
    • http://rofuvawitarul.atwebpages.com/alg_ii_antrag_ek.pdfIn PDF document text
    • http://poposumezaxek.rf.gd/army_drill_weekend_hours.pdfIn PDF document text
    • http://mopepuveg.epizy.com/banajoxapegutomas.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010819.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10819 5428 bytes
SHA-256: ed7ec089d0fb11044272814b6c512de6fae108a4e0b23c233d32bb2de112759f
font_01_sfnt_off00011a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A70 11048 bytes
SHA-256: 98eaf49637e5cc7a4d3fb08b4d5e32a5df6108cd60779d5b44b238af1e5a1e5f
font_02_sfnt_off00014034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14034 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176