Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c957689b80fa3e7…

MALICIOUS

PDF

72.7 KB Created: 2021-03-06 16:01:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: a4edc5b11dd0a008371323a1dd87ee1f SHA-1: 05a171d9ae073018bcff405699f1775f120f3efb SHA-256: 8c957689b80fa3e7ca43a4d1deb2b54a7134e14e196f397ae64b7c9e90051fc8
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://xajibur.ru/award?keyword=the+boy+in+the+striped+pajamas+test+questions PDF link annotation
    • https://gijixejuk.weebly.com/uploads/1/3/4/8/134880041/sajaja.pdfIn PDF document text
    • https://lanasasaf.weebly.com/uploads/1/3/0/8/130815311/kafugibopu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387046/normal_60011fef8ba1f.pdfIn PDF document text
    • https://xegunato.weebly.com/uploads/1/3/4/3/134315925/4358936.pdfIn PDF document text
    • https://pamukisap.weebly.com/uploads/1/3/4/7/134761215/1659320.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_602aa5e6ecfcc.pdfIn PDF document text
    • https://ribosotegolexo.weebly.com/uploads/1/3/4/0/134013239/32990ba74a1f06.pdfIn PDF document text
    • https://sotinele.weebly.com/uploads/1/3/4/6/134640455/3c335b0fd48e6.pdfIn PDF document text
    • https://lawuzifelive.weebly.com/uploads/1/3/4/0/134041442/sofiwo.pdfIn PDF document text
    • https://vaxulisexo.weebly.com/uploads/1/3/4/6/134600260/a50f74ea492d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367923/normal_5fdeadd5b7a2d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464078/normal_6008f88531f43.pdfIn PDF document text
    • https://lusogovo.weebly.com/uploads/1/3/4/3/134358567/c046fd.pdfIn PDF document text
    • https://novufetus.weebly.com/uploads/1/3/4/1/134131343/funarefu_puwumex_fogusoxikig_nilimufukazot.pdfIn PDF document text
    • http://zhenskiizhurnal.ru/how_to_make_cool_stuff_in_minecraft_easyldoga.pdfIn PDF document text
    • http://sellforce.ru/lojawolirexuzalixolokuvem4eyg3.pdfIn PDF document text
    • http://salonhq.xyz/wisinifozafugupatgnyl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://13fad4bf-7224-44b3-802b-16842e97d241.filesusr.com/ugd/b14664_5e59b04bdf484ef59b3f49d62ae66bbc.pdf?index=trueIn PDF document text
    • https://e0f910ba-f4aa-4d6b-87f6-24d78cda99ab.filesusr.com/ugd/cc15ef_81cc4e7909e74fcea78387b889277a5c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/rosiwesopumukit.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/conseil_bronchiolite.pdfIn PDF document text
    • https://s3.amazonaws.com/kezemiradigu/effects_of_noise_ielts_reading_answers.pdfIn PDF document text
    • https://9526c93a-d340-4dca-b5fd-2864ff0888c4.filesusr.com/ugd/4c3d6a_48495f9ceece4be6a6e779f220344e38.pdf?index=trueIn PDF document text
    • https://1cdd1dcb-54a5-4750-95ad-c4cce9a68cd1.filesusr.com/ugd/1e32c2_943fc43fffd445dda11efc4bf9d5fb17.pdf?index=trueIn PDF document text
    • https://dd7ee03d-3646-4e01-a1e1-4c0a7e2c9e57.filesusr.com/ugd/d7ba0f_3db676739dc44b389146158800f78b39.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/answering_service_care_careers.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/knights_chronicle_netmarble_guide.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_off0000de89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE89 5560 bytes
SHA-256: 2288bbbacecb55f5162e2fa46f4f9387b6a6d93473770d32acc64968fb8c3b29
font_01_sfnt_off0000f142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF142 10504 bytes
SHA-256: 8be8647bd06837a6edd52aa3d96037125ea78155f4dd72e274d8116029ec8955