Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1cff6f8669abab8…

MALICIOUS

PDF

81.6 KB Created: 2021-04-18 05:29:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 385fe183cfa7a2f286d6954cc4875f45 SHA-1: 8ebb02f0746153613bd1e9e55ef830502c019cf7 SHA-256: c1cff6f8669abab8b3e8d01ef450b475d8755c45d5a903b37002dde54bf95a49
186 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains a significant number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though partially corrupted, contains text related to dog obedience classes and application metadata, which may serve as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jottigo.ru/strik?utm_term=how+much+does+dog+obedience+class+cost PDF link annotation
    • https://cdn.sqhk.co/waxobakal/gOQm3wb/private_messaging_app_for_couples.pdfIn PDF document text
    • https://cdn.sqhk.co/kizusuvut/gfBgfhb/lagutuxegobidini.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CsaOhdD/77800013952.pdfIn PDF document text
    • https://vefonero.weebly.com/uploads/1/3/1/0/131070196/kanixutukepi_zojijorix_xizebatulazepa_bonufovizafaruv.pdfIn PDF document text
    • https://givodevivunafa.weebly.com/uploads/1/3/1/8/131871579/vizesepidetala.pdfIn PDF document text
    • https://cdn.sqhk.co/mixirulizab/ihyijjh/siwepomezigerironi.pdfIn PDF document text
    • http://getcabinets.xyz/45690718075oybjq.pdfIn PDF document text
    • https://cdn.sqhk.co/velizovatim/ojfgdie/list_of_all_spices.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/dSjjid4/grumman_aircraft_world_war_ii.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/D8ifij3/27208998277.pdfIn PDF document text
    • https://cdn.sqhk.co/gapekozuwa/ajLpGjh/16901694702.pdfIn PDF document text
    • http://expressday.online/vemenilicl6vg.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzozuni/jlibheR/don_t_rush_slow_touch_song.pdfIn PDF document text
    • https://cdn.sqhk.co/nisavivurefu/hegghjq/19716718845.pdfIn PDF document text
    • https://cdn.sqhk.co/rojisixel/ihahfK1/bagamejibam.pdfIn PDF document text
    • https://xaliwituxezaxe.weebly.com/uploads/1/3/5/3/135323019/9ab651142902e7.pdfIn PDF document text
    • https://cdn.sqhk.co/kefivaxepaj/hi3haod/bumijarolo.pdfIn PDF document text
    • https://cdn.sqhk.co/zezinojox/gdKSxhS/85523963190.pdfIn PDF document text
    • https://mosugomepa.weebly.com/uploads/1/3/4/0/134096926/dolog.pdfIn PDF document text
    • https://babixugopanodip.weebly.com/uploads/1/3/5/3/135382952/334f728d8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/65cce2b1-d437-4b1f-a73d-d5deac2e79c2/how_to_become_a_licensed_real_estate_agent_in_nc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0282fee5-23c7-4471-a1f6-8e286634ea08/38396148539.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/322d01e8-dddb-4dd0-8abb-e0a15e9ebf3f/robilamofo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c51826c-d420-465a-a36a-a6c41fa9348d/bapegumokotoroja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de14ee6c-06d0-4357-bcc2-890a8a456413/smartio_fast_file_transfer_app_for_android.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D8 5332 bytes
SHA-256: 66555bf017f1e0d195799dcd30d8e5ed34a090317f0271103605f9586d86ac5e
font_01_sfnt_off000106e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E0 10536 bytes
SHA-256: 401a72986a1187efc7153efe9eb2b37bba0aa13972092e1d4bcc5ea533d3929d
font_02_sfnt_off00012ab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB1 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361