Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6036f308683f079…

MALICIOUS

PDF

83.2 KB Created: 2021-03-15 04:38:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44519a9587a112d101289cbd34a399f9 SHA-1: 514083c858fac78831b2fc71e5a21e56ce8913cb SHA-256: b6036f308683f07972e0e3a9e93a28f2c474092c67422659d56b533cb859d21f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm designed to manipulate search engine results. The primary URL, 'https://golowaki.ru/wix?keyword=the+legend+is+born+ip+man+parents+guide', suggests a lure related to a specific search query. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent, likely to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/wix?keyword=the+legend+is+born+ip+man+parents+guide
    • https://cdn.sqhk.co/mevazasid/5gfdhhi/ranubuwakan.pdf
    • https://cdn-cms.f-static.net/uploads/4367922/normal_603fd98908579.pdf
    • https://cdn.sqhk.co/mumesimasozo/ehcjfgd/kikidonuxi.pdf
    • https://dopesitelubi.weebly.com/uploads/1/3/5/3/135307477/kijawaxoriga.pdf
    • https://cdn-cms.f-static.net/uploads/4449177/normal_6019f759677e6.pdf
    • https://cdn-cms.f-static.net/uploads/4464534/normal_603e3e04a0aeb.pdf
    • https://cdn-cms.f-static.net/uploads/4366628/normal_602c4ba848815.pdf
    • https://cdn.sqhk.co/juzogimuju/dggnAcT/panebipefub.pdf
    • https://gegixigozazewit.weebly.com/uploads/1/3/4/8/134858275/gejifudesisiru_midir_zajetilelufo_vufigugi.pdf
    • https://static.s123-cdn-static.com/uploads/4367275/normal_5fee87d30f7fc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/805b9694-bfa0-41a2-a764-dc7c5c768c31/99_names_of_allah_nasheed_duff_mp3_download.pdf
    • https://s3.amazonaws.com/rokuwapesu/set_jdk_path_in_android_studio_ubuntu.pdf
    • https://uploads.strikinglycdn.com/files/961ea212-e4ef-4428-8811-42157d5f170e/hamlet_book_review_ppt.pdf
    • https://uploads.strikinglycdn.com/files/9f39da84-47cd-4bba-a8e4-0786f19fcaa8/88546599210.pdf
    • https://s3.amazonaws.com/lanubili/43949350658.pdf
    • https://s3.amazonaws.com/fomaralunex/extreme_call_blocker_pro_apk.pdf
    • https://s3.amazonaws.com/ragejufa/pamphlet_template_google_docs_free.pdf
    • https://uploads.strikinglycdn.com/files/0ed0332e-2a37-477f-82b3-aeccf496608f/36504255803.pdf
    • https://uploads.strikinglycdn.com/files/dd25e19e-4ce9-46b0-bcb6-16d8b77ea761/what_are_the_rules_of_spanish_21.pdf
    • https://s3.amazonaws.com/legesiliv/echo_pb_403t_backpack_blower_manual.pdf
    • https://uploads.strikinglycdn.com/files/d7339e45-7f29-4615-a2d5-2ea454a0bcc3/dotujubolar.pdf
    • https://uploads.strikinglycdn.com/files/917cba2f-6b2d-4149-98da-8ab564992424/casio_g_shock_3031_battery_replacement.pdf
    • https://uploads.strikinglycdn.com/files/921ae275-8d2c-401b-82e6-3dde6c30cfc3/38285928941.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fec8.bin
8815371a9acbbd54e7614d37765f0d06fc20ebb6edf6c63e7ab50044b7d67317
pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC8 5464 bytes
font_01_sfnt_off00011120.bin
daad3f347a4f42f432ee9983e619a7c063e36761dba5934b469418034847e28e
pdf-font-stream PDF embedded font (sfnt) at offset 0x11120 1800 bytes
font_02_sfnt_off000119ae.bin
e137cab2bd3ba0cf3576b74fe56da32f88b7838febf83a7209b4a6611304b2ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x119AE 10748 bytes