Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a3289b23e9a38a4…

MALICIOUS

PDF

83.5 KB Created: 2021-04-07 20:48:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7537efb6db56203c2b0a3840f98b217b SHA-1: 46db1f350fee76db5d4a19a346bb7301ed90a1f5 SHA-256: 7a3289b23e9a38a48e5a9164f68d25459c108b4903a66a5714d6d630c9122e1e
196 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or malware distribution lure. It contains a large number of external links, many pointing to an SEO redirector, which is a common tactic for distributing malicious content. The primary redirector URL is https://fokemale.ru/strik?utm_term=software+qa+engineer+salary+uk. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest an attempt to direct users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://fokemale.ru/strik?utm_term=software+qa+engineer+salary+uk PDF link annotation
    • https://murufirekitopu.weebly.com/uploads/1/3/1/8/131856476/zurimupime.pdfIn PDF document text
    • https://dojifidixiwaji.weebly.com/uploads/1/3/4/3/134372722/raradisisegu.pdfIn PDF document text
    • http://jofarofuwudeveb.66ghz.com/test_coombs_directo.pdfIn PDF document text
    • http://zoo-taxi.site/peg_perego_john_deere_gator_xuv_greenr8xqa.pdfIn PDF document text
    • http://unityfree.xyz/siem_reap_cambodia_food_guide2h15t.pdfIn PDF document text
    • http://wirelessinfo.ru/moultrie_deer_camera_setuprxqqo.pdfIn PDF document text
    • https://xulozajewe.weebly.com/uploads/1/3/1/3/131384688/siwodevirapegizazul.pdfIn PDF document text
    • http://static-start.top/rizavudevvryw9.pdfIn PDF document text
    • https://wanomumopanud.weebly.com/uploads/1/3/1/3/131379193/fadivopozom-noronat-jopug.pdfIn PDF document text
    • http://zhenskiizhurnal.ru/pimuvelaxutakatesuzuzojsrse9.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/tokit/cd4504b_datasheet.pdfIn PDF document text
    • https://2d841ef3-a248-4e6a-996b-2d54d6713fdd.filesusr.com/ugd/1decf9_80c2be3951e64738b2b7d18c07efe063.pdf?index=trueIn PDF document text
    • https://836291d8-7b77-40db-be8c-3105928c7ef3.filesusr.com/ugd/aae074_4b0643a6d99e41849d596712e40ebc19.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/how_to_calibrate_jbl_soundbar.pdfIn PDF document text
    • https://s3.amazonaws.com/sefepugolupalax/preschool_director_job_description_template.pdfIn PDF document text
    • https://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_b01d0d97eb5a44bdbe5b0947031002e6.pdf?index=trueIn PDF document text
    • http://buteboregof.epizy.com/husky_60_gallon_air_compressor_specs.pdfIn PDF document text
    • https://951e66c5-660f-4748-bfcc-a6cc0831133d.filesusr.com/ugd/4967bb_7ce5c7511de34ada926d133be4447bc9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/maze_runner_4_trailer_espaol.pdfIn PDF document text
    • https://04a9e765-cf69-4035-9b9a-998d8fb4e692.filesusr.com/ugd/8c5016_834a018683a04f3493d08fb84ade97ad.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_off0001093b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1093B 5424 bytes
SHA-256: d4966ec4a3b330656397c212aa4a33f8b654f42ab805ded4ae49231d74156214
font_01_sfnt_off00011bd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD6 11040 bytes
SHA-256: 5c4d4631fd021778a0f3fdbb7e2956e2c2a2b55c59a6f79d9ef10c92e4545cff