Malicious PDF — malware analysis report

Static analysis result for SHA-256 cba2f185de6a06bd…

MALICIOUS

PDF

73.9 KB Created: 2021-05-09 05:44:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 393f8abf65d4b9c163bcbf19cdc9b0d5 SHA-1: 72ca9300756642c0340529db21a68249381b0c04 SHA-256: cba2f185de6a06bde71eb9734f0b498819ead39912da320a19d36a67c1b52a72
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 0.9960

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://resalured.ru/strik?utm_term=how+to+create+a+bubble+sheet PDF link annotation
    • https://tosoremekik.weebly.com/uploads/1/3/4/7/134771766/bowuzovezemoro.pdfIn PDF document text
    • http://form-lnstagramverifiedbadges.com/ledafewinaduxarafalisiletkgqz.pdfIn PDF document text
    • https://mokonalu.weebly.com/uploads/1/3/0/7/130739423/97f58cfe91c.pdfIn PDF document text
    • http://koprovk.xyz/xbox_one_owners_manualepz7o.pdfIn PDF document text
    • http://003-center.ru/why_does_katniss_wear_the_mockingjay_pinbjkpk.pdfIn PDF document text
    • http://50offit.pro/mpsc_engg_pre_2019_answer_key9btku.pdfIn PDF document text
    • https://cdn.sqhk.co/zudipoje/sd38jeq/london_fog_full_sheet_set.pdfIn PDF document text
    • http://reduslim-sito.site/what_words_should_not_be_capitalized_in_titles1e19p.pdfIn PDF document text
    • https://telogedibosujo.weebly.com/uploads/1/3/1/4/131438044/tiwogajafomut.pdfIn PDF document text
    • http://tehnikator.ru/supovuwo0fsms.pdfIn PDF document text
    • https://burojexadolej.weebly.com/uploads/1/3/4/1/134108553/kafirotobudirebar.pdfIn PDF document text
    • https://cdn.sqhk.co/tamireto/u2QWzih/wopelagetawuleginebodogeb.pdfIn PDF document text
    • https://cdn.sqhk.co/vozeseseber/icghiio/photo_collage_maker_free_pc.pdfIn PDF document text
    • http://sandwichhq.club/broken_heart_drawing_steps6cvrp.pdfIn PDF document text
    • http://mbfsopg.com/pet_jumping_spider_dietzpe66.pdfIn PDF document text
    • http://7lessons.space/56005392154gcfof.pdfIn PDF document text
    • https://bokonipazesokut.weebly.com/uploads/1/3/1/3/131398478/9725765.pdfIn PDF document text
    • https://cdn.sqhk.co/bulunazi/ohfxiiM/19936278434.pdfIn PDF document text
    • http://remontnatali.ru/84664697556owcag.pdfIn PDF document text
    • https://cdn.sqhk.co/xifobariw/Gnqz4ic/2417463298.pdfIn PDF document text
    • https://cdn.sqhk.co/lanuniwa/2heiggc/draw_it_game.pdfIn PDF document text
    • https://cdn.sqhk.co/zubejavaxuvu/pZlmGhc/hopper_motorplex_reviews.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/3b4762d3-bbe0-43ef-8d0b-ccaa1d264f0a/new_england_beef_tips.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef537823-4f4b-44c4-a6b9-4eaf6cd08039/peraditezumemodipifisejer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96de0065-edcf-4e1e-9b75-bbfdc8c66328/resumen_de_la_obra_las_flores_del_mal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8d47cea-a983-44c9-a77b-d33e76161b69/zefoxunopuvixegaxok.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_off0000e570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE570 5080 bytes
SHA-256: 462f4ad425971b0f7f48fa6a556d4f053c4d13f7a30f9928ebfaa202a37533c5
font_01_sfnt_off0000f6bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BC 10580 bytes
SHA-256: 3f66fd4bd053eafb8c2a3baaa5ab657b97abf30c01b306013d2c07f3fd3167e7

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