Malicious PDF — malware analysis report

Static analysis result for SHA-256 6007544d258ca43f…

MALICIOUS

PDF

73.9 KB Created: 2021-03-30 14:23:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: f59f7bdff6726f3758a4d52fc6370d68 SHA-1: 46ee20cecd9a98687bf6e1e482e66e68f3a06ff0 SHA-256: 6007544d258ca43f4b795d17275546b70c065b19206a432d4c5fe66faf45e5e4
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous external URIs, including one pointing to 'nipisod.ru', suggesting it's designed to redirect users to malicious sites. The document body, though heavily garbled, contains references to 'Kenworth t800 service manual' and authoring information, indicating a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://nipisod.ru/strik?utm_term=kenworth+t800+service+manual PDF link annotation
    • http://kexedeziferu.sportsontheweb.net/important_vocabulary_english_to_bangla.pdfIn PDF document text
    • https://dasezakam.weebly.com/uploads/1/3/4/8/134883145/aa12b.pdfIn PDF document text
    • http://dfahsdfgjsfg.online/el_seor_de_las_moscas_resumen_capitulo_30744v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500878/normal_603f4d2feffe5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407807/normal_6041aa9fc80ea.pdfIn PDF document text
    • http://idealica-italiaufficiale.site/todoxariwisuxibumesavo8jvas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470553/normal_5ffdb9509b413.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428331/normal_6003d8da51203.pdfIn PDF document text
    • http://reliables.ru/act_test_prep_book_2020k9xyj.pdfIn PDF document text
    • https://sibafuguwo.weebly.com/uploads/1/3/4/6/134679660/fasimuwisun-wuzeteletew-xevalomiwinijuf.pdfIn PDF document text
    • https://gawotajar.weebly.com/uploads/1/3/4/5/134525297/durile.pdfIn PDF document text
    • http://vkrowl.com/bingo_classic_offline_bingo_gratuitosdtipp.pdfIn PDF document text
    • http://playmarket-online.com/mibototoxipuxowilivasalb8f.pdfIn PDF document text
    • https://zobaretax.weebly.com/uploads/1/3/1/4/131482953/2385237.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443619/normal_604d1d5db10ef.pdfIn PDF document text
    • https://gazelavulokar.weebly.com/uploads/1/3/4/2/134265358/fawepilov_vaweda_dojizutilida_ropibolevufizux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f21c44f6-647d-404e-a059-345d73a5e157/15247742128.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/how_much_do_naval_officers_earn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dfdeecd-a352-4e06-985c-94fad5ffe3c1/31262227001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2131d57b-f627-44d9-89ca-edb6b5767d4e/fijosopobapigi.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/hang_tags_templates_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f5a626f-843d-4570-b143-827b482ee4c3/2012_hyundai_sonata_hybrid_transmission_recall.pdfIn PDF document text
    • http://sidepojedava.myartsonline.com/90222416939.pdfIn PDF document text
    • http://fajazimigig.atwebpages.com/ap_budget_speech_2020_20.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_off0000e346.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE346 5496 bytes
SHA-256: 3f9111051c52813db7207bcfb090ab49f06da762957c32ec15942f5a0eb91237
font_01_sfnt_off0000f5ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EA 10696 bytes
SHA-256: 2d7bb13871efa2156f96998fa6b68093d5c01f9cc2ce8073d84b53804c2d3ab8