Malicious PDF — malware analysis report

Static analysis result for SHA-256 8012326bde009bcf…

MALICIOUS

PDF

83.4 KB Created: 2021-03-22 00:11:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4a3d4674cf53863c5f747248054f8de5 SHA-1: 10ea0ffd66cc38e67f91be374e2bd10b2de3629f SHA-256: 8012326bde009bcf667c7c846151c4c0fbd6f751861b95733dc4aee1ceaa4946
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=what+is+cognitive+neuroscience+psychology PDF link annotation
    • https://tavifarexup.weebly.com/uploads/1/3/4/6/134611028/6694662.pdfIn PDF document text
    • http://daludaja.getenjoyment.net/54955945430.pdfIn PDF document text
    • https://cdn.sqhk.co/dorusafe/UeqwRUU/cross_stitch_embroidery_machine_designs.pdfIn PDF document text
    • https://semoburepov.weebly.com/uploads/1/3/2/8/132815840/5378547.pdfIn PDF document text
    • http://ribadubeko.scienceontheweb.net/aggregation_and_composition_in_c.pdfIn PDF document text
    • https://dunawotota.weebly.com/uploads/1/3/1/4/131438316/disetas.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/iSNLje1/amazing_thief_in_hollywood_full_movie_free.pdfIn PDF document text
    • https://dugaposiga.weebly.com/uploads/1/3/4/8/134857723/9198893.pdfIn PDF document text
    • http://lofajemami.sportsontheweb.net/zoomer_zuppies_candy_instructions.pdfIn PDF document text
    • http://xafesuvorolivig.scienceontheweb.net/pupigekuxokilewuxil.pdfIn PDF document text
    • https://cdn.sqhk.co/bebubofawa/doihjjC/free_texas_holdem_poker_near_me.pdfIn PDF document text
    • https://tifavuloxu.weebly.com/uploads/1/3/0/7/130776439/tariruxanexu.pdfIn PDF document text
    • http://povisowalikim.scienceontheweb.net/how_to_play_bar_chords_for_beginners.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dugerem.atwebpages.com/basic_bodice_block_drafting.pdfIn PDF document text
    • https://d99d9bf7-a5e0-49f2-90ac-0d1bc881463d.filesusr.com/ugd/0182ef_4e64627c1d0f448da56139ca0b069180.pdf?index=trueIn PDF document text
    • https://12c48f50-3553-44c7-a31c-19fc5df83d07.filesusr.com/ugd/7e0eb0_3fcec69c06114a1ba459e12033fe9be6.pdf?index=trueIn PDF document text
    • http://wipadafefuxasi.onlinewebshop.net/imaginarium_polar_express_train_set_instructions.pdfIn PDF document text
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_9f5f2812277147de946bb04587086894.pdf?index=trueIn PDF document text
    • https://1f2f8e77-98df-4c5e-b88a-83bc2b612b58.filesusr.com/ugd/5c7528_97598bbc792e4232932bd4c4a6e0ae6f.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001091a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091A 5372 bytes
SHA-256: 9722cbf8bdde98d2d52fcdc4e4bd52f9a74fa76000a6e1fa8ef399ae3f309cf0
font_01_sfnt_off00011b74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B74 10672 bytes
SHA-256: 70ba007aaf22c9a0e74c70e890a39f9d8d5a427bd665e842cfeb31a083839ffa

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