Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b4b2af823cf23f1…

MALICIOUS

PDF

77.8 KB Created: 2021-03-04 15:50:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 080a988173a46a9ba572bb01a3adfe40 SHA-1: b7ce4cf49e526bb773d7ff4729f4ccfe2483c00d SHA-256: 1b4b2af823cf23f1363869836498c25196471823ccc4a9eea3babd93d97fe834
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, with many pointing to disposable hosting services. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of external URIs suggests an attempt to redirect the user to potentially harmful content.

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://jottigo.ru/wb?keyword=these%20happy%20golden%20years%20poem PDF link annotation
    • https://rasogumelix.weebly.com/uploads/1/3/5/4/135400304/7347855.pdfIn PDF document text
    • https://falufanimuv.weebly.com/uploads/1/3/4/3/134377488/wotitizokigovexebod.pdfIn PDF document text
    • https://nevipezuke.weebly.com/uploads/1/3/4/6/134652321/a7d97401.pdfIn PDF document text
    • https://wivozodibadire.weebly.com/uploads/1/3/0/7/130775536/1864676.pdfIn PDF document text
    • http://ronojalad.22web.org/91598926346.pdfIn PDF document text
    • https://fiwozipuwawew.weebly.com/uploads/1/3/0/8/130814157/bagoxe_vamini.pdfIn PDF document text
    • https://losewilim.weebly.com/uploads/1/3/4/8/134854933/raridamusowafo_mebonoxaxi_pedalifavubibub_fakate.pdfIn PDF document text
    • https://jerexibim.weebly.com/uploads/1/3/4/6/134654770/tukeniwabipipa_xularik_xojokagoniruw.pdfIn PDF document text
    • https://zoladawa.weebly.com/uploads/1/3/4/1/134108991/93f7c9.pdfIn PDF document text
    • https://junipupupu.weebly.com/uploads/1/3/4/7/134739756/fivatomexuf_raligun.pdfIn PDF document text
    • https://fifiruzi.weebly.com/uploads/1/3/0/7/130775727/marojaxomumojos.pdfIn PDF document text
    • http://xodufaviwez.iblogger.org/xibexunivewutuso.pdfIn PDF document text
    • https://jajibesuwazigix.weebly.com/uploads/1/3/1/3/131383486/liwaxa.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/dedinavesute/nixisejuro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f03ce13-c112-49d9-9861-ce7324b452e0/is_cancer_and_capricorn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0ac73d0-7c8a-43dc-8c2c-b5a91bca8404/bosch_dishwasher_silence_plus_46_dba_troubleshooting.pdfIn PDF document text
    • http://parubixus.rf.gd/wamibuwilizadewazoxosuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8aa64c95-41bb-41ea-b3ce-e08e0a7bff35/nefolonudukufenupavavalex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13fe5262-92f3-4a40-8580-70d9fd9e124d/how_to_setup_dymo_labelwriter_4xl_for_ebay.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/vomotot.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/12303053446.pdfIn PDF document text
    • http://bewaxupu.rf.gd/74119034517.pdfIn PDF document text
    • http://lasuwutiganije.rf.gd/latest_gospel_praise_and_worship_songs_2020.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_off0000f2ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AB 5424 bytes
SHA-256: d4f97c9105f1dee747f9109adc99be1af132eb321c06fd4ee0102d29a36e9cd3
font_01_sfnt_off000104fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FE 11140 bytes
SHA-256: 28c9aa015c6a4ef0d88975bcf38fc2dff0513c3e51d7f130e87d02afb0a27f02