Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8aa817a3da18159…

MALICIOUS

PDF

77.8 KB Created: 2021-03-20 00:07:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0af81fcc400bd596ed0a446d92c8e003 SHA-1: 855c4c6f4caa5b60da8f32357bbbf551f13860ce SHA-256: f8aa817a3da18159ff3bd860ecf88d827a0345c5d0be135213a92ce2109a8385
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 0.9991

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://crophysi.ru/123?utm_term=lgabb41865+battery+datasheet PDF link annotation
    • https://cdn.sqhk.co/wegodimumod/iejdOid/58095695425.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486987/normal_6040f20d9f696.pdfIn PDF document text
    • https://cdn.sqhk.co/nitunoda/hfmQCid/92342460377.pdfIn PDF document text
    • https://xadarerisisiw.weebly.com/uploads/1/3/2/6/132682239/2370959.pdfIn PDF document text
    • https://cdn.sqhk.co/tixukiko/XKgdggh/bobimaverilukitiwenimi.pdfIn PDF document text
    • http://vimobewawulipiz.mypressonline.com/hp_deskjet_2132_printer_driver_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405946/normal_5fde6d9198391.pdfIn PDF document text
    • http://ninomut.sportsontheweb.net/definicion_de_registro_anecdotico.pdfIn PDF document text
    • https://vewiwuxipax.weebly.com/uploads/1/3/2/6/132681682/joxap.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/how_to_pair_roku_remote_to_panasonic_tv.pdfIn PDF document text
    • http://tajavimisafom.22web.org/cryptocurrency_trading_guide_for_beginners.pdfIn PDF document text
    • https://vebafuxitupum.weebly.com/uploads/1/3/4/8/134890404/mufinonosejagikereg.pdfIn PDF document text
    • http://pakavoposot.22web.org/rumi_love_poetry_book.pdfIn PDF document text
    • https://megewesaj.weebly.com/uploads/1/3/0/7/130738707/lezuzonumore_kebawevarat_gupipetugeso.pdfIn PDF document text
    • https://xojowikenokux.weebly.com/uploads/1/3/4/7/134706662/a5789f4b6fb4.pdfIn PDF document text
    • https://cdn.sqhk.co/fapolokid/eTY1ijY/samsung_phone_grand_prime_plus_price_in_bangladesh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383452/normal_5feffff187612.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xefujuji.rf.gd/jamaica_kincaid_short_stories.pdfIn PDF document text
    • http://zigixukotezu.epizy.com/rifigu.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/valajofonado.pdfIn PDF document text
    • http://vizawog.epizy.com/jogareroluma.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/98391644648.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/action_replay_max_ps2_elf_download.pdfIn PDF document text
    • http://jinugiwi.atwebpages.com/a_year_with_my_camera_book_1.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_off0000efb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB2 5848 bytes
SHA-256: b40127c1fe2e7d26b7e4f165681f6022cc776db9c7298998fd206b982e751954
font_01_sfnt_off000103a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A7 11164 bytes
SHA-256: c463b7ce09b274662dcbe072ffc012d38c729cdc012c9ed4818f7a744daf0ddc

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