Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2057a20381f0490…

MALICIOUS

PDF

79.8 KB Created: 2021-03-28 02:37:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 56a2c5cdd94683bfff05730441e91479 SHA-1: 494b6a54f81af1ca3673271dae91e9352975b892 SHA-256: b2057a20381f04901f314f112689673f56c87f2ca5d5e0e46dee5a837146de6d
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for SEO link farming or to direct users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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.
  • 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/award?keyword=semikron+thyristor+datasheet+pdf PDF link annotation
    • https://cdn.sqhk.co/vitimosugu/ixVhesm/science_lab_safety_quizlet.pdfIn PDF document text
    • https://cdn.sqhk.co/dokukavifig/jeB7Ggg/26417131806.pdfIn PDF document text
    • https://cdn.sqhk.co/jobiwokojo/ULB9wvJ/trace_mobile_current_location_online_free.pdfIn PDF document text
    • https://xavujome.weebly.com/uploads/1/3/0/7/130739328/wazobu.pdfIn PDF document text
    • https://cdn.sqhk.co/fanekizesedi/hbYhbhb/miracle_whip_mayonnaise.pdfIn PDF document text
    • https://cdn.sqhk.co/miviterul/e898jjb/davuxovewunarunimenujosad.pdfIn PDF document text
    • https://cdn.sqhk.co/nazamesuwute/kn1gjhf/shuffle_music_song_streaming_player_classic.pdfIn PDF document text
    • https://cdn.sqhk.co/fofateze/eY7iPP0/cppdroid_c_c_ide_free_download.pdfIn PDF document text
    • https://nepikazot.weebly.com/uploads/1/3/4/5/134526085/somama.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/bFtBgeV/gelefa.pdfIn PDF document text
    • https://bixirugabo.weebly.com/uploads/1/3/0/9/130969405/xakozawubagoda.pdfIn PDF document text
    • https://cdn.sqhk.co/pemenixa/dT1jiZ3/service_pros_installation_group_charlotte_nc_phone_number.pdfIn PDF document text
    • https://cdn.sqhk.co/lanasido/4pExijR/jixutogageju.pdfIn PDF document text
    • https://cdn.sqhk.co/vefoveted/ghghmhb/lovusi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/zorba_the_greek_full_movie_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/47414475298.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/city_of_calgary_recreation_program_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/is_there_free_wifi_at_planet_fitness.pdfIn PDF document text
    • https://s3.amazonaws.com/pafiganovavi/16917255012.pdfIn PDF document text
    • https://s3.amazonaws.com/zarevizebi/mikojoxogujonidarikezed.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/kelazugaxefomuz.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/60483718156.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
    • 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_off0000d2bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2BF 4324 bytes
SHA-256: e90a14e73565ba88b36963f6fc6f879e1bd1a94b9e6cb7521e1713036b1e2dcc
font_01_sfnt_off0000e20d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE20D 5520 bytes
SHA-256: 7196a1e3eb91e6c90ea8a3582fcfbecc0550d7b82011ff2dcc8a00b9dbaefb0c
font_02_sfnt_off0000f4b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B0 12356 bytes
SHA-256: 275d49cc105d1db4a0db3ebd2c6d7053aa54ce998105135dea05dc1581fe17a2
font_03_sfnt_off00011bd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD0 16140 bytes
SHA-256: 1ffca1ef16be5e2ec436e77f9211a88ad3199dc781cb76600401cc2e2c7dce6d

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