Malicious PDF — malware analysis report

Static analysis result for SHA-256 f432f587fe9fcad0…

MALICIOUS

PDF

103.4 KB Created: 2021-04-04 04:53:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 276485afb7b2ef1b6693df1e2c789316 SHA-1: 809118c1bdf8a17174417023cb7c6dd428fe1ae5 SHA-256: f432f587fe9fcad0784b7ef582b4cf076f936df451753af2d61c784778c48392
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://golowaki.ru/strik?utm_term=main+idea+task+cards+2nd+grade PDF link annotation
    • http://hushseo.online/pacific_fitness_zuma_workout_manualorq9r.pdfIn PDF document text
    • http://excschool.ru/liwobarodewazukorivuxezusacjv6.pdfIn PDF document text
    • https://ketawisu.weebly.com/uploads/1/3/1/4/131454029/0c4681.pdfIn PDF document text
    • https://fezulenigi.weebly.com/uploads/1/3/4/4/134485980/8d6069054677.pdfIn PDF document text
    • https://fafemuwupid.weebly.com/uploads/1/3/4/3/134368635/lobodiwufuloma.pdfIn PDF document text
    • http://artyom.guru/nabovasajuvibutirepatoduj8bbb.pdfIn PDF document text
    • http://monubagujizud.mywebcommunity.org/lijutovew.pdfIn PDF document text
    • https://zolotamazuragif.weebly.com/uploads/1/3/2/7/132712333/bemagoba.pdfIn PDF document text
    • http://passive-income.ru/fopukubujubapud5kl45.pdfIn PDF document text
    • http://future-techno.ru/is_hiit_strength_training_or_cardio3h3ni.pdfIn PDF document text
    • http://jirenaxapibetig.scienceontheweb.net/5978323106.pdfIn PDF document text
    • https://dosedupuwosiwoz.weebly.com/uploads/1/3/0/7/130776272/zuwelu.pdfIn PDF document text
    • http://dotavulilego.mypressonline.com/wuwevuxexo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3caa4030-7dd6-4be4-8a8a-e1981c45b3cd.filesusr.com/ugd/704988_2dcfd57e0fa4454da6b348d70a89a6cf.pdf?index=trueIn PDF document text
    • https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_c070ba589c274e94a7a743da7009ed7d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/kagan_cooperative_learning.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/jasmine_tamil_movie_2019_songs.pdfIn PDF document text
    • http://fazaburifug.myartsonline.com/89183270919.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/exercise_and_cellular_respiration_lab_worksheet_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/horizon_zero_dawn_trophies_guide.pdfIn PDF document text
    • https://9eb5ee95-128e-4115-bcd6-d8db8525ce49.filesusr.com/ugd/9904c2_3f5034487b034660af8fd108ad8dba96.pdf?index=trueIn PDF document text
    • http://xukokumo.myartsonline.com/bank_aptitude_test_questions_with_answers.pdfIn PDF document text
    • https://b5c4f4dd-ae1f-4f6a-908c-f463551224e4.filesusr.com/ugd/dafd60_8a764080a185428ebb9272fc71a757b3.pdf?index=trueIn 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F6A 6676 bytes
SHA-256: 063f624657f28023927b60c464d465508ab1fb53ff5c74fc5014745254f6f9aa
font_01_sfnt_off0001403f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1403F 5276 bytes
SHA-256: b22738ed40ef64187c2ec91530b580bf171f40fc49ad643bc1d062aa0af0dee8
font_02_sfnt_off00015253.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15253 11848 bytes
SHA-256: 9348dea2bb2d537f9db780374c5e10215e2564a1873a0124cc59ecf3f642ac91
font_03_sfnt_off00017ad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17AD8 16116 bytes
SHA-256: 5ec139a263af45d7cbac1bc1a000173eb4e7f97797aba0f35ce2e37505b4886e

Open this report in the interactive analyzer, or submit your own file for analysis.