Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab80d689ac5b39c0…

MALICIOUS

PDF

78.2 KB Created: 2021-03-25 00:28:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c8e5a6caa49dea663882b656bcd31e6c SHA-1: 5ab3e892d660db5bfae8319c4c69d4d4067c73e7 SHA-256: ab80d689ac5b39c01ddf9dd9fd3163ba058be7ac8a873eceef9f1b85535315d5
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The primary URL identified is https://pelibifir.ru/123, which is likely part of a phishing or malware distribution scheme.

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://pelibifir.ru/123?utm_term=antecedentes+de+la+administracion+de+personal+pdf PDF link annotation
    • https://cdn.sqhk.co/zibomevuguli/dhgheDm/lynx_adaptations_in_the_deciduous_forest.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojelawov/mhdWijd/bass_pro_shop_san_jose_santa.pdfIn PDF document text
    • https://kiloxuloje.weebly.com/uploads/1/3/5/3/135398856/gezulote-dejabogi.pdfIn PDF document text
    • https://jobeluraxofedir.weebly.com/uploads/1/3/4/3/134317239/469430.pdfIn PDF document text
    • https://pozimifekof.weebly.com/uploads/1/3/4/6/134674510/loromunupeg-pimisifapuvu-koxewuzusuv-posukawoxok.pdfIn PDF document text
    • https://zarixurumis.weebly.com/uploads/1/3/1/4/131406049/86ebbaf35b37510.pdfIn PDF document text
    • http://nozafonavuf.iblogger.org/26212146685.pdfIn PDF document text
    • https://wavajonenavu.weebly.com/uploads/1/3/1/8/131871509/72b6a7b1.pdfIn PDF document text
    • https://gizalikujaxemif.weebly.com/uploads/1/3/4/6/134606641/kuxelagisa_jadufevurojim_danixuguzomil.pdfIn PDF document text
    • https://cdn.sqhk.co/dikulodut/7w0BVgf/84061000877.pdfIn PDF document text
    • https://sanakutubifave.weebly.com/uploads/1/3/4/8/134849958/9b301e.pdfIn PDF document text
    • https://cdn.sqhk.co/xekejegixawo/rQqTFie/vatufevudupidixosezogalem.pdfIn PDF document text
    • https://madonosole.weebly.com/uploads/1/3/4/5/134582414/8501487.pdfIn PDF document text
    • http://bopigupuwag.iblogger.org/easa_aerodrome_manual_checklist.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f459ab6e-ac57-43ce-b83a-1524846427e4.filesusr.com/ugd/938c70_a91d037f3fc040f8adb803f4800eb360.pdf?index=trueIn PDF document text
    • http://rakejobik.epizy.com/how_to_measure_performance_in_the_business_process.pdfIn PDF document text
    • https://5c90cfa9-af55-48e2-9430-1f3580382729.filesusr.com/ugd/e2b09b_f743e12527b349cbb99cfbfee3661405.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca770a14-2d24-4174-b9f8-6045d81b1895/can_you_make_money_flipping_houses_in_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adc8de03-eed1-48ce-8da8-2e7227d54ed5/fesumapib.pdfIn PDF document text
    • https://8c285b57-3156-47ce-881b-df665acc117b.filesusr.com/ugd/8d46c2_bac528ed17cd45b38ba389732a7d82b7.pdf?index=trueIn PDF document text
    • https://2ea9429b-0332-4ee6-bb75-ab9535b56c99.filesusr.com/ugd/e2f7e1_c7eb84c960a6481d98e913b71811a06f.pdf?index=trueIn PDF document text
    • http://kobewanen.rf.gd/android_auto_not_working_on_sync_3.pdfIn PDF document text
    • http://sexujojo.epizy.com/kinoko.pdfIn PDF document text
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_ed11147f75944f9f9d11700503963369.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_off0000f07f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF07F 5288 bytes
SHA-256: 38c2095018d94e29d4c535486983a6b6c4d729998b50a029d903fc953763e39e
font_01_sfnt_off00010265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10265 11940 bytes
SHA-256: 6462e1b23ea995132156a6e9065cba95e1b3df80afe477bd4aa1dd762873027c

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