Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae2f386821dd6a6…

MALICIOUS

PDF

79.8 KB Created: 2021-04-27 14:07:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: eb56c78dbbf60a51ed3b91baa8255337 SHA-1: d92572a44e8df8e052670351c7d7951efeaa0f1d SHA-256: cae2f386821dd6a6030879df1a5abf20a90423063b1862bd1dc3a23ace13491c
186 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The document body, though heavily obfuscated, suggests a lure related to 'Harry Potter 5 libro precio'. The presence of PDF_SEO_LINK_FARM and PDF_SEO_DISPOSABLE_LINK_FARM heuristics, along with ClamAV detection as Pdf.Phishing.Trojan, strongly suggests malicious intent. No scripts were extracted, but the overall structure points to a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xezojetit.ru/strik?utm_term=harry+potter+5+libro+precio PDF link annotation
    • https://cdn.sqhk.co/zedazisem/Gjjhhgg/81263621625.pdfIn PDF document text
    • http://tafakiduwav.scienceontheweb.net/dirumedasuwotebunedip.pdfIn PDF document text
    • https://cdn.sqhk.co/vakolitakap/hfgiMgi/fanitewetefigovotudafez.pdfIn PDF document text
    • https://cdn.sqhk.co/pananumujo/hhiichb/car_accident_deaths_2019_uk.pdfIn PDF document text
    • https://sugemisikuwev.weebly.com/uploads/1/3/1/8/131856456/wamotoredeluve-dezus.pdfIn PDF document text
    • https://cdn.sqhk.co/nakijalufiw/tFicifC/age_of_empires_2_cheats_car.pdfIn PDF document text
    • https://nuxutesinof.weebly.com/uploads/1/3/1/4/131437012/xubigopupu.pdfIn PDF document text
    • https://cdn.sqhk.co/zoribakim/Qoggfhb/94595497706.pdfIn PDF document text
    • https://pipabujul.weebly.com/uploads/1/3/2/6/132680817/gumazojutupim.pdfIn PDF document text
    • http://roxopazin.iblogger.org/kimura_disease_case_report.pdfIn PDF document text
    • http://ridovise.sportsontheweb.net/46801474807.pdfIn PDF document text
    • https://cdn.sqhk.co/wadelovelo/njgGETb/declaration_of_war_december_8_1941.pdfIn PDF document text
    • http://raraveluwogevuw.mypressonline.com/72191307272.pdfIn PDF document text
    • https://cdn.sqhk.co/bedazume/9oKFP0J/live_football_tv_europe.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://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_b3ba3aa1ade14a369caecb0839e04807.pdf?index=trueIn PDF document text
    • http://dipagepe.atwebpages.com/74172027085.pdfIn PDF document text
    • https://c546c886-5aa5-41cc-813f-4ed3e146772c.filesusr.com/ugd/b3e52d_7c14a93bb8e94176af72469047262fd7.pdf?index=trueIn PDF document text
    • http://defisatum.epizy.com/walatibejutudow.pdfIn PDF document text
    • http://buxazub.epizy.com/mathematical_models_in_economics.pdfIn PDF document text
    • https://0296ecfc-28ae-4fa5-925c-67a25994cace.filesusr.com/ugd/c88839_f259611caba644cd9a09ef10a77a14b3.pdf?index=trueIn PDF document text
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_0579b46c5cc744f996a0dda029fbf94d.pdf?index=trueIn PDF document text
    • http://femubavavozemag.epizy.com/how_many_fallacies_are_in_love_is_a_fallacy.pdfIn PDF document text
    • http://jafesok.epizy.com/laxomoloxavopagureg.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_off0000ed60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED60 4756 bytes
SHA-256: ecb444ad3ce1dd8d25b28ef9ac7151358034b57f2deba0feee104696b4ab4e9f
font_01_sfnt_off0000fda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA2 11080 bytes
SHA-256: 4a05d0b166cb66efb7a047dc20a26723c883e1f6c26d74568c7455bdd2c5c1e4
font_02_sfnt_off00012345.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12345 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176