Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bb9a25f92461e04…

MALICIOUS

PDF

69.9 KB Created: 2021-03-22 16:40:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8d01b7110329ae81854cb6cce0611f4d SHA-1: 4319ffbf9a1b9a469cbfc3ebc11764a0eb4cafec SHA-256: 2bb9a25f92461e0453fe8860c3ba2440b42244916bce6adeaff5d0ca1685985e
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many hosted on disposable domains, indicative of a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. The presence of numerous external links, including one pointing to a PDF on 'mygamesonline.org', supports the classification as a potential distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://bologen.ru/123?utm_term=babylon+translator+app+android PDF link annotation
    • http://revilokepudidu.mygamesonline.org/9259283077.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377935/normal_60266aa90ebfa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479710/normal_5fe4a767e3654.pdfIn PDF document text
    • http://bibivire.mygamesonline.org/tofisagidana.pdfIn PDF document text
    • http://jomikifu.medianewsonline.com/nodizuvimepilalajegot.pdfIn PDF document text
    • http://gagitevanonuti.mywebcommunity.org/86560574277.pdfIn PDF document text
    • http://rosutob.getenjoyment.net/mississippi_drivers_permit_test_booklet.pdfIn PDF document text
    • https://sadewirezetif.weebly.com/uploads/1/3/4/3/134318623/4960225.pdfIn PDF document text
    • http://kofojoxake.mygamesonline.org/the_veil_norfolk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372980/normal_60569039e801c.pdfIn PDF document text
    • http://jafoxidulez.mypressonline.com/lidowugesuzunowadof.pdfIn PDF document text
    • http://fudoviwil.mywebcommunity.org/navy_blue_cooling_neck_gaiter.pdfIn PDF document text
    • https://nolipugi.weebly.com/uploads/1/3/4/6/134652161/9342211.pdfIn PDF document text
    • https://lezekuzog.weebly.com/uploads/1/3/1/3/131378913/dajopu_dekavive.pdfIn PDF document text
    • https://xitosuwoga.weebly.com/uploads/1/3/3/9/133988858/8694394.pdfIn PDF document text
    • https://gagegopered.weebly.com/uploads/1/3/4/8/134880179/sobine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487206/normal_602723689edb6.pdfIn PDF document text
    • https://jipofaxinevafud.weebly.com/uploads/1/3/4/3/134350183/gisatomoromupuf.pdfIn PDF document text
    • https://wifevotus.weebly.com/uploads/1/3/4/8/134897576/rumukami.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rigidafavubo.myartsonline.com/gegelofiv.pdfIn PDF document text
    • https://d872ce2a-2baf-4032-ab86-ab75b2f66d52.filesusr.com/ugd/338562_7d66dc79f918462fa5e44a967eb57489.pdf?index=trueIn PDF document text
    • http://velelakolifuvu.onlinewebshop.net/rixikobinijisavolelejixed.pdfIn PDF document text
    • https://9d349da1-218b-4b59-9e37-2a90cab56d40.filesusr.com/ugd/de9003_445546f2465d41b6b53dd88bebc4d835.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_off0000d19d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD19D 5244 bytes
SHA-256: a714c057b59bdce9008d103321d3a8f2af28ff4af2438961bd39675b6dd68167
font_01_sfnt_off0000e37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37B 11200 bytes
SHA-256: 6ebdefb6fbcd43d6a5d315978ab9179639cf4e255979a41893341a376fcf3002