Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f6e71b0640030f3…

MALICIOUS

PDF

80.7 KB Created: 2021-05-31 09:11:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f03694d77d20222349b01fd908578b03 SHA-1: d426da601248464110001339b303aad8e14967db SHA-256: 7f6e71b0640030f3a218702c08f5447da028f780f049b24d1354766aeafa2565
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm, suggesting a phishing or malicious redirection attempt. The presence of a URL related to 'Robinhood application pending' strongly indicates a phishing lure. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards malicious intent, likely to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://bologen.ru/strik?utm_term=robinhood+application+pending
    • https://tomadukego.weebly.com/uploads/1/3/6/0/136083679/3301114.pdf
    • https://tupirusu.weebly.com/uploads/1/3/4/7/134702138/1008079.pdf
    • https://bobubimusibobu.weebly.com/uploads/1/3/4/7/134715312/pukuduzono-zetibegepolibe-mitusobapa.pdf
    • https://lukajupuxeburi.weebly.com/uploads/1/3/4/6/134630189/munanezazim-vuxin.pdf
    • https://pizufugutim.weebly.com/uploads/1/3/4/7/134723530/kavawa.pdf
    • https://wirejosesem.weebly.com/uploads/1/3/1/8/131856641/jemin-ketedibalu-tipigokijamaz.pdf
    • https://linoraza.weebly.com/uploads/1/3/1/4/131437671/gigegivelo-resiri.pdf
    • https://vojawozusuv.weebly.com/uploads/1/3/1/1/131164351/perer_lewepir.pdf
    • https://satobolusiv.weebly.com/uploads/1/3/1/3/131398412/dezigowuvasadiju.pdf
    • https://lepamatizetu.weebly.com/uploads/1/3/0/7/130739269/galisoxojijesodoru.pdf
    • https://wegukovomaf.weebly.com/uploads/1/3/4/8/134865780/tatun_gukugonu.pdf
    • https://vumazilizulorap.weebly.com/uploads/1/3/5/3/135300666/2907064.pdf
    • https://rujovisaz.weebly.com/uploads/1/3/4/3/134328318/kumepujizo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ed62fae1-820e-4b72-bfbc-f4842f6a9ff4/cisco_4742hdc_remote_control.pdf
    • https://uploads.strikinglycdn.com/files/af8de6da-2534-4ab7-a060-d184252b771d/how_to_draw_manga_characters_a_beginners_guide.pdf
    • https://uploads.strikinglycdn.com/files/04d16b9a-fd14-4a35-aa14-1d2f32ff8f80/diy_easy_diy_where_the_wild_things_are_costume.pdf
    • https://uploads.strikinglycdn.com/files/a9f7675c-530c-4b5d-899e-19409db418a8/fomon.pdf
    • https://uploads.strikinglycdn.com/files/cbbaf408-6290-4a16-9270-b46fa7db6cf1/51664067606.pdf
    • https://uploads.strikinglycdn.com/files/628214d5-0b7f-4afc-8190-de57661672ee/41989894855.pdf
    • https://uploads.strikinglycdn.com/files/31896255-c811-4864-95e2-3620f06dc078/52065291268.pdf
    • https://uploads.strikinglycdn.com/files/54b9a071-3daf-4032-8e98-9e632ddbd42f/new_moon_in_capricorn_2021_horoscope.pdf
    • https://uploads.strikinglycdn.com/files/c61b3396-ff5e-4144-8830-dee52c2fd305/pusimifafugadun.pdf
    • https://uploads.strikinglycdn.com/files/442ec634-3f70-4a2b-ac4f-527851f960c1/53359635269.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_off0000fb34.bin
136a9792df5aceac92e4107dfade89a706dd5d1fb6b5071a41a81024a25292e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB34 5208 bytes
font_01_sfnt_off00010ce7.bin
8b2dada860dd05baf6bad947f6ef68f2d697cb599b4e585c31cb0548cb67e86b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE7 11840 bytes

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