Malicious PDF — malware analysis report

Static analysis result for SHA-256 606c0cc2da7995e0…

MALICIOUS

PDF

80.8 KB Created: 2021-04-04 04:30:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: acc367823b1c1dfc3c3ccd946827eeee SHA-1: 5ac54475cfb7d33334faf3187433d6ee8274dabc SHA-256: 606c0cc2da7995e041c4d6d4cb62cdcee6d99f572045cbb85038dc9841758a79
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 0.9997

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://xajibur.ru/wix?keyword=cheer+2020+emmy+nominations PDF link annotation
    • https://nafuvazufu.weebly.com/uploads/1/3/1/4/131407552/7943283.pdfIn PDF document text
    • http://olx-delivery.cc/257977879mlrsf.pdfIn PDF document text
    • http://pipvip.ru/mopogoxipasgq2z7.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/liminal_thinking_review.pdfIn PDF document text
    • http://soldonlakewood.com/42052254492wjvp9.pdfIn PDF document text
    • http://vadosixajobirug.mygamesonline.org/tnpcb_assistant_engineer_syllabus_2020.pdfIn PDF document text
    • http://lazirog.mywebcommunity.org/36196483944.pdfIn PDF document text
    • https://lulofaki.weebly.com/uploads/1/3/1/4/131453598/notofumifef_livevosumiv_bavisudad.pdfIn PDF document text
    • http://femuxeririta.mygamesonline.org/60550341454.pdfIn PDF document text
    • http://vashastrahovka24.ru/pmbok_guide_5th_edition_freed5m2r.pdfIn PDF document text
    • https://gofolepoxi.weebly.com/uploads/1/3/4/8/134882907/75a8f88ab.pdfIn PDF document text
    • http://gojavodevagajuw.mygamesonline.org/guvaxa.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/pokixovuxik/alone_together_tagalog_movie.pdfIn PDF document text
    • http://xobibaga.myartsonline.com/genie_model_3053_installation.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/kijujisirojew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8e8cec4-90a9-42d1-8ee3-ba32853051e9/how_to_increase_brightness_in_casio_fx_991ms.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b39c79a-5414-4807-9acb-1910d058d671/emotion_sensation_wheel.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/math_multiplication_crossword_puzzles.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/ramorunawajazuxozar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8b4a789-2305-4b0a-9023-b5efc4a5d6cd/why_wont_my_corsair_keyboard_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4461cd4-f5a5-4228-aa83-cb1335dd33b3/pezonuzatinuranenadon.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_off0000fc9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9C 5172 bytes
SHA-256: 6e6bb09b026d6fa7af8f0acc7b434a20ed34898cde9381a724fb8113e1f4e091
font_01_sfnt_off00010e00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E00 11604 bytes
SHA-256: a4163f67dc1ec652a5637f7b973b1f387f0f9c517fc3a3957321b704a67ba646

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