Malicious PDF — malware analysis report

Static analysis result for SHA-256 094908e22ac3857e…

MALICIOUS

PDF

80.6 KB Created: 2021-03-30 22:56:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: fd4c71d4e6c7dcffa10a9358ba52a04d SHA-1: 07b7cf72db90e4c938b246fc1fc5fca7107e49b3 SHA-256: 094908e22ac3857ece58424b3e8688a2618b06b601a7464e13bf1788acf653ba
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, identified by the PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics. Many of these links point to disposable domains and are likely used to manipulate search engine rankings or to distribute further malicious payloads. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/123?utm_term=adblock+browser+f%25C3%25BCr+android+apk PDF link annotation
    • http://bodaweziwov.mypressonline.com/anna_tsing.pdfIn PDF document text
    • http://dashcamtopbest.com/basics_of_building_drawing7wdwa.pdfIn PDF document text
    • http://sozaxesugoj.mywebcommunity.org/vinanigavotaniref.pdfIn PDF document text
    • http://nukicew.xyz/58655028069cacyo.pdfIn PDF document text
    • http://trokot-shopnew.online/brother_ds-720d_error_code_2019nmry2.pdfIn PDF document text
    • http://lefibipefazefep.mypressonline.com/fios_quantum_gateway_router_speed.pdfIn PDF document text
    • http://nomudepalak.medianewsonline.com/85177008666.pdfIn PDF document text
    • http://arnautmebel.ru/nemaxojigunibovejai7yho.pdfIn PDF document text
    • http://dezimazokuxulil.mygamesonline.org/how_to_start_business_plan.pdfIn PDF document text
    • http://tortomsk.ru/51089402304bdfcg.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/vudivuzakal/tekaxidiguxefobevodikuda.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/22567525246.pdfIn PDF document text
    • https://5de9ed01-d610-4143-94db-6f998645a8ce.filesusr.com/ugd/1d8bf6_1947201113f644eb84c1450fdda37780.pdf?index=trueIn PDF document text
    • https://b00f38ea-0d13-4519-ab0f-1253f0d03ca0.filesusr.com/ugd/289c5e_a9f17f85c63d4e7ca5d737ce9a9f037b.pdf?index=trueIn PDF document text
    • https://dba0ca6b-c979-46b3-87c9-041648dee063.filesusr.com/ugd/6f58fb_157d7a592055476bb271bb9ca2ccd987.pdf?index=trueIn PDF document text
    • https://944bcc21-9f45-42c2-9889-8cf837fa5d1c.filesusr.com/ugd/50f869_9226f5d817674bf58305101f034ec7c9.pdf?index=trueIn PDF document text
    • https://5b0ea1c3-b874-41d5-a3cc-49595beb80a6.filesusr.com/ugd/0c63be_baa53676c0484bc68571805d4b6f7ca2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/can_you_airplay_with_a_samsung_tv.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/kilezexa.pdfIn PDF document text
    • https://aa5f33e9-793b-4807-a257-9eac84d314d0.filesusr.com/ugd/aa57b2_215ff091a3b249869cf815c66751085f.pdf?index=trueIn PDF document text
    • https://df6a9abb-74f3-47e1-b359-fe6d1019da36.filesusr.com/ugd/7921d2_9479617b36cc45ebbfe211a8753eff1e.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_off0000e3d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3D6 5556 bytes
SHA-256: 89f930d19f9392c05115330e514e5a356b6f367491afce48877a2e89dff6b3fe
font_01_sfnt_off0000f69e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69E 2868 bytes
SHA-256: 1802912221aeba07e1908440bbd40c4f7f1711918f46f06a493e698bbb4f6cce
font_02_sfnt_off000102e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E0 20416 bytes
SHA-256: 42c321f786a9d871369661a49588672fa298d7fdb47b83883accd1d2408fe58e