Malicious PDF — malware analysis report

Static analysis result for SHA-256 2afe60de16b57e3a…

MALICIOUS

PDF

76.2 KB Created: 2021-03-24 21:15:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a09c08892b2e3dc34a700f39c04664ce SHA-1: da8d90655cf9fd06afac2db8c49d7cb75476eb8f SHA-256: 2afe60de16b57e3aad25941f0e30ea13cca3af46bf7ef93cbad5fcf7c66583e3
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm. The primary URL, 'https://pelibifir.ru/strik?utm_term=50+ways+to+leave+your+lover+drum+tab', suggests a lure related to music tabs, which is likely a pretext for phishing or malware delivery. ClamAV detection and ML classification further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=50+ways+to+leave+your+lover+drum+tab
    • https://vujajewuriwox.weebly.com/uploads/1/3/5/3/135387523/nopizokeregi-bopetu-turexoxa-kuwuxapogawanuv.pdf
    • https://vifewilepame.weebly.com/uploads/1/3/4/0/134012930/5607634.pdf
    • https://jelalepoxona.weebly.com/uploads/1/3/4/9/134901657/mukukakebe_zovuwinow_tidesi_gotixojax.pdf
    • https://cdn.sqhk.co/vopufepivipe/ifFh1Uq/swipe_brick_breaker_the_blast_apk_mod.pdf
    • https://cdn.sqhk.co/bavisimupux/hiiidjf/fosiwetepevatar.pdf
    • https://fazodokivev.weebly.com/uploads/1/3/4/0/134018208/6049141.pdf
    • https://cdn.sqhk.co/sigagegijej/2jegjb1/defender_110_hcpu_dimensions.pdf
    • https://cdn.sqhk.co/rexukewanej/vqgeLMX/afrikaans_movies_mp4.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3b3adb6e-2a53-482d-be0a-a74adfa2e078/guzaxarupuxedatukawekog.pdf
    • https://uploads.strikinglycdn.com/files/86647d9f-6f14-4f7c-978c-af05abff2aac/apc_back-ups_xs_1500_software_download.pdf
    • https://a540aa65-2eb1-4ac3-86d0-bf6a54daac96.filesusr.com/ugd/2d797c_5cebe9b73f6a40388b14e9bd8d6b9992.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5f570c64-ca66-4bed-b222-dcb12b119d3d/how_long_do_you_cook_a_pork_shoulder_in_an_electric_smoker.pdf
    • https://aa4c2489-c93b-4667-afab-104bf5323bad.filesusr.com/ugd/8b49c6_a463f747683e453bbe0a7c68f83c948f.pdf?index=true
    • https://4c2674ec-1430-4cec-a455-d6a35d10586e.filesusr.com/ugd/38955b_abbc415b36944f46a89ddd0d4adff734.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ea881dcf-7abd-46a3-95db-be2b3c888ea8/34254682502.pdf
    • https://uploads.strikinglycdn.com/files/812a70d8-60fa-4e17-b5f0-8b9c20e67c71/is_the_i_ching_the_same_as_the_tao_te_ching.pdf
    • https://6c8027e1-9878-41b3-a9ef-32ba2b6bcd02.filesusr.com/ugd/185811_706eaf5d5c23489eab9e483020b605f6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/0e94210c-c696-4c1f-8e8e-20389ee0e963/blue_bossa_real_book.pdf
    • https://uploads.strikinglycdn.com/files/ec830744-d3ae-40d3-afba-7321ec6e25fe/ukulele_sheet_music_free.pdf
    • https://uploads.strikinglycdn.com/files/a3eea583-ffe4-45e2-ab98-252b707d415e/can_you_train_muay_thai_at_home.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e87b.bin
aa0a8be53663dcc90fa540cbcb1949994286f02670ab96ac1b0b151f71e1b661
pdf-font-stream PDF embedded font (sfnt) at offset 0xE87B 5536 bytes
font_01_sfnt_off0000fb51.bin
0560658ecd1148523fd218c6d39a3ce2e05aba1018e4b239928bbec8739a5ad6
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB51 11704 bytes