Malicious PDF — malware analysis report

Static analysis result for SHA-256 78d707915f43fbc1…

MALICIOUS

PDF

79.2 KB Created: 2021-04-19 13:59:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 528017b2e2b53931da30ecb4ea66d498 SHA-1: 96e6892d723e4eb23d5527345316a8a1369a6958 SHA-256: 78d707915f43fbc19b091f117dae60c14cc52e27a040d2233c96d1b6d2d381c8
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://baarspo.ru/strik?utm_term=download+contoh+surat+lamaran+kerja+via+email+doc PDF link annotation
    • https://cdn.sqhk.co/ketalidukepi/gfHidnz/chicken_revolution_warrior_mod_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403541/normal_602e73dacdb1d.pdfIn PDF document text
    • https://xomivumikeso.weebly.com/uploads/1/3/0/7/130774979/nariwi.pdfIn PDF document text
    • http://newoxoxi.mywebcommunity.org/map_of_maycomb_county_in_to_kill_a_mockingbird.pdfIn PDF document text
    • http://zekaxezixil.medianewsonline.com/greenworks_2000_psi_pressure_washer_ratings.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491164/normal_5fffcfdba7591.pdfIn PDF document text
    • http://pumorux.medianewsonline.com/vemubuneni.pdfIn PDF document text
    • https://cdn.sqhk.co/vuramufef/igdjjih/mod_apk_resident_evil_4_android_lollipop.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414339/normal_605d641b154d5.pdfIn PDF document text
    • https://cdn.sqhk.co/dubeminap/hcagjbH/zombie_thing_10_inch.pdfIn PDF document text
    • http://sluzhba1.net/migegudosubimalawegoj2cmo.pdfIn PDF document text
    • http://voztrans.ru/sniper_elite_5_gameplay_pcly9aa.pdfIn PDF document text
    • https://kixifosesezor.weebly.com/uploads/1/3/3/9/133998007/sakupovagojiza-kogazif.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384632/normal_60629a695545d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382406/normal_5fe1841e2cbf8.pdfIn PDF document text
    • http://xijipeva.mypressonline.com/22563083618.pdfIn PDF document text
    • https://cdn.sqhk.co/gobejilu/jnmHEjg/ankush_film_song_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fba569a-0051-4e89-a91e-4f7f71219a68/jogezivavipodog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac584e13-4447-4518-8cbe-bb8478d09dc8/tcp_ip_illustrated_volume_2_second_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9e42905-c361-4a10-b30f-d8c8dd4490b5/dikilunatu.pdfIn PDF document text
    • http://kizufalugomux.atwebpages.com/articles_quiz_with_answers.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_off0000f82a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82A 5472 bytes
SHA-256: c544de1e4be4c1c0e1682b2ee0256d8b8a5b72f06c00934783053d283f5d5e99
font_01_sfnt_off00010ab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB5 10672 bytes
SHA-256: 666c83b02c02e166d453d64af960a5dede90555e291b30357cbd25d12baa676d

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