Malicious PDF — malware analysis report

Static analysis result for SHA-256 016f3acff4f4f539…

MALICIOUS

PDF

84.3 KB Created: 2021-04-01 22:53:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5f1f5d32797ddd16a256bffeebbc4374 SHA-1: e1a70a5267142529ac9255e7a75a33a5489b3538 SHA-256: 016f3acff4f4f53998ad92d3214ddce2176d89f6f7be642a1c37a2d60a8a6178
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jottigo.ru/wix?keyword=energy+work+and+power+worksheet+ch+5.1+answers PDF link annotation
    • http://topchambre.xyz/730784267217iggf.pdfIn PDF document text
    • https://cdn.sqhk.co/pubabolab/UlwWha0/99260761822.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455902/normal_6008cd98d3508.pdfIn PDF document text
    • http://nukels.xyz/labunefirepulajinmvdfd.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/hiVhijc/86034985524.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421460/normal_602dc9227c6d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404292/normal_5ff6d3617abe3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422912/normal_5fc62ac751bb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383702/normal_5fe8d5b530bd0.pdfIn PDF document text
    • http://otshelnik.net/jaxilokajomukonobkm93.pdfIn PDF document text
    • https://cdn.sqhk.co/torujazelome/ghe8E8L/telugu_best_love_bgm_ringtones_free_download.pdfIn PDF document text
    • http://shishkin-seed.xyz/moral_of_the_story_one_hour_cleangk8ph.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443325/normal_6039b6367a93b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470543/normal_6014ca5f95daf.pdfIn PDF document text
    • http://inmyshtangen.xyz/61004871093zceug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494889/normal_600eaa66ea593.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457876/normal_601be3acf038a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503584/normal_605d99c2aa23e.pdfIn PDF document text
    • https://cdn.sqhk.co/sejarepezibo/Rhcja3y/57334088615.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/hbfZgdL/funny_gifts_for_mens_40th_birthday.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416128/normal_6058a465b3c4f.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/difigomisosak/how_to_get_rid_of_yellow_peroxide_stains.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubifirigevi/exame_de_cariotipo.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/face_recognition_algorithm_python.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/weber_spirit_ii_e-310_gas_grill_review.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_off00010a6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A6E 5728 bytes
SHA-256: 8e1cf5ac4fee2e624128970b4deee0935ec67485579fad59076b0f3e8951d4ed
font_01_sfnt_off00011e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E15 10892 bytes
SHA-256: 905008df088f1254e930c22ff8f6b6ee745f2edefac5570794cf695a09c3d88e

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