Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eec1b64a627e372…

MALICIOUS

PDF

79.9 KB Created: 2021-06-08 10:39:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: db0f245fa62abfc72091ba63375611ed SHA-1: a9bdc9de2a16217085d2ec1905920bce0dcb160d SHA-256: 6eec1b64a627e372164fb0f40b2c041c2430d6dbb0262a60584466a7e9c208fc
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by multiple heuristics and an ML classifier. It functions as a link farm, containing numerous external URIs, with a significant number hosted on disposable domains. The primary URL, 'https://crysiq.ru/pbw?utm_term=what+is+the+concept+of+starbucks', suggests a potential phishing or SEO manipulation tactic. The presence of many external links indicates an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://crysiq.ru/pbw?utm_term=what+is+the+concept+of+starbucks PDF link annotation
    • https://pevawufanuru.weebly.com/uploads/1/3/7/5/137518929/negede.pdfIn PDF document text
    • https://menajogatidufe.weebly.com/uploads/1/3/0/7/130740573/2845235.pdfIn PDF document text
    • https://tepikibinaf.weebly.com/uploads/1/3/2/3/132303010/duzusutori-dakoti-mimavivogefem.pdfIn PDF document text
    • https://parikijofema.weebly.com/uploads/1/3/1/3/131383717/lufetulujebaku_jadubes.pdfIn PDF document text
    • https://rivatuvimib.weebly.com/uploads/1/3/4/4/134469475/jitukij-ruwutowunujora-fonebedenaki.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/cad8ee24-cb0a-4264-aa45-6d8b98af1b78/80813873919.pdfIn PDF document text
    • http://ronefete.pbworks.com/w/file/fetch/144490611/winazigap.pdfIn PDF document text
    • http://daridameku.pbworks.com/f/wetip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5f84d60-2253-4f98-923d-df2ee137e131/81400136110.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da5bfff7-dab4-44dd-88e4-0581bc743b7f/alan_moore_watchmen_hbo_show.pdfIn PDF document text
    • http://raxonepem.pbworks.com/w/file/fetch/144752820/64667863048.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11af9c76-391c-471c-b7fe-73f3e5100092/words_of_power_wow_andorath.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/375db81f-c191-42eb-bb22-7e990d5cf6de/disneys_high_school_musical_jr._script.pdfIn PDF document text
    • http://jitilabajeko.pbworks.com/w/file/fetch/144527535/83745374372.pdfIn PDF document text
    • http://sofutikajen.pbworks.com/w/file/fetch/144476343/answering_machine_not_picking_up.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4164dc4d-ba35-42c9-adef-afe90403f27c/science_crossword_puzzles_with_answers_for_class_9.pdfIn PDF document text
    • http://lenivuzuk.pbworks.com/w/file/fetch/144743214/how_to_setup_amazon_echo_plus_2nd_generation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6f6e9b2-d643-488d-a6b8-3594b17afdcd/sharp_carousel_1.8_microwave_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7b624ae-6d07-4889-b5e7-71dc29420ec3/minecraft_gift_code_generator_2019_no_survey.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5a89361-54b0-4508-9731-d19e75398639/87899329831.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97d7c4e2-cb30-4f4f-ab9e-9a597b539de6/the_count_of_monte_cristo_novel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59d6fcf0-67ea-4982-9d8f-c6780f8ea9ab/latogelekoxisufaperidapez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1277539-f2e4-4e86-baf6-7117b8d1e554/28715382714.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66e1f94a-4465-4bc6-9c6b-4e5cc46717a4/how_to_address_a_letter_of_recommendation_for_a_job.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB58 5172 bytes
SHA-256: 07f0a1545ac19ae071ce3e2b9a4f376fb57239f22c8b7adbaecdd19d69329f55
font_01_sfnt_off0000fce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE2 11564 bytes
SHA-256: 995c29b6765ba571532881e1b1a0c9eeaed8223cf789fc6dc3a47945cbdea1bc
font_02_sfnt_off000123e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123E3 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361