Malicious PDF — malware analysis report

Static analysis result for SHA-256 78f6d53dbb97a272…

MALICIOUS

PDF

78.6 KB Created: 2021-03-02 14:03:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 8b216a5ab8c46082f331dc7fb323b49f SHA-1: 5b958d206fc10a44b1a5e12175b4eae2f1ce7c09 SHA-256: 78f6d53dbb97a2722e0ff0d0dd5e286bc1913fbf95e0c79d1eb4ab3b80d1ee5a
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded URLs are likely used to redirect users to malicious sites or download further payloads.

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://midufefew.ru/strik?utm_term=grammar+english+pdf+cambridge PDF link annotation
    • https://cdn.sqhk.co/molavagew/a4rBnIX/national_geographic_telescope_nt114cf_parts.pdfIn PDF document text
    • https://cdn.sqhk.co/jufebarur/g8jj3id/joxelavod.pdfIn PDF document text
    • https://cdn.sqhk.co/bexamajuw/hcRhgjh/fruit_ninja_apk_mod_hack.pdfIn PDF document text
    • https://neseroto.weebly.com/uploads/1/3/5/3/135326238/617f44646ce86.pdfIn PDF document text
    • http://migerov.xyz/what_is_the_story_of_the_three_billy_goats_gruffmiwwc.pdfIn PDF document text
    • http://chunyoo.com/56743122782wis9f.pdfIn PDF document text
    • https://cdn.sqhk.co/jogepirar/hchgKjd/53044682699.pdfIn PDF document text
    • https://sufevibuxaka.weebly.com/uploads/1/3/2/7/132712301/9694042.pdfIn PDF document text
    • http://buytoday.cc/2006_bmw_330i_reviewkxi2x.pdfIn PDF document text
    • https://cdn.sqhk.co/faroziwe/ids0zWD/ugm_mission_store_salem_or.pdfIn PDF document text
    • https://cdn.sqhk.co/baxoladipezu/8xDHii0/nakobafuz.pdfIn PDF document text
    • https://bebamewikirebu.weebly.com/uploads/1/3/0/8/130874540/foxok-dapiniborufege-filifanufeku-jeboxakakome.pdfIn PDF document text
    • https://cdn.sqhk.co/rumomezojeku/abZggia/laser_quest_spokane.pdfIn PDF document text
    • https://cdn.sqhk.co/reriwoduriju/aejjKhh/39184356457.pdfIn PDF document text
    • https://dojilosadokadog.weebly.com/uploads/1/3/4/8/134890500/wozokute.pdfIn PDF document text
    • https://cdn.sqhk.co/woxemumi/iagjWjh/worms_3d_pc_iso.pdfIn PDF document text
    • https://cdn.sqhk.co/bikakigiben/UiiJ7hh/35994931328.pdfIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pedamodaw.onlinewebshop.net/how_to_tell_if_caps_lock_is_on_logitech_k350.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://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000eeab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xEEAB 8632 bytes
SHA-256: 452aa75208720f284c905fe6fbd0a7ebff1a4d3888ac30cf5f799062eb0d087f
font_00_sfnt_off0000db59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB59 5740 bytes
SHA-256: d8a81ef8e970f516df96c1ba833b4441e4c69910e5fb098e1f1343254da1a745
font_02_sfnt_off000106af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AF 12400 bytes
SHA-256: 791a415afda9167c22eb8363b9a4630ac61794bbba08627dd57beefcbc2ac34e

Open this report in the interactive analyzer, or submit your own file for analysis.