Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba7c100df023e7b…

MALICIOUS

PDF

71.3 KB Created: 2021-06-09 20:08:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: ca4154fe582bd8a4d81f5af68a2e3275 SHA-1: c8255c981afdfa0a38083892bc9f2ca0c4ffe8a1 SHA-256: 2ba7c100df023e7b7044977f4ff2c183229cf11ea6f5121b57b4a99fcf0b2678
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are hosted on disposable domains or use UTM parameters, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or a scam related to 'ppp loan forgiveness excel template'. No scripts were extracted, but the PDF structure itself is indicative of a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crysiq.ru/pbw?utm_term=ppp+loan+forgiveness+excel+template PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369794/normal_5fddf62e01ca6.pdfIn PDF document text
    • https://ladukupubavar.weebly.com/uploads/1/3/0/7/130776836/ceb7ca00b.pdfIn PDF document text
    • https://napuraviseso.weebly.com/uploads/1/3/4/3/134322211/31c459a3.pdfIn PDF document text
    • https://mesasijodise.weebly.com/uploads/1/3/5/3/135315214/7168726.pdfIn PDF document text
    • https://favadela.weebly.com/uploads/1/3/1/0/131070298/7973474.pdfIn PDF document text
    • https://jazafojof.weebly.com/uploads/1/3/4/3/134310209/kumejurujon.pdfIn PDF document text
    • https://xolavubapipivuk.weebly.com/uploads/1/3/5/3/135302485/selagi-malugobulajeri-kimej.pdfIn PDF document text
    • https://toxerixefekivi.weebly.com/uploads/1/3/5/2/135296371/wivapik_bejajikemox_zekafakiwux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383295/normal_60201c77976e7.pdfIn PDF document text
    • https://wufenimikefi.weebly.com/uploads/1/3/4/3/134366244/wojavewozudujo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc091f2f-22f9-4955-bb02-e665079a76f2/betrayal_at_house_on_the_hill_rules_2nd_edition.pdfIn PDF document text
    • http://safubudesowi.pbworks.com/w/file/fetch/144881361/tudodag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e552223-f779-498a-afd3-042c9ddec324/metaphor_worksheet_grade_2.pdfIn PDF document text
    • http://muxapoxowo.pbworks.com/w/file/fetch/144644652/wigika.pdfIn PDF document text
    • http://redelaw.pbworks.com/w/file/fetch/144619173/listado_de_verbos_regulares_e_irregulares_en_ingles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29494847-adca-4ec4-aecb-a8db585acc14/sims_3_64_bit_expansion_packs_wont_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5526c82-3da3-4364-9c3e-d5bc3dcca256/walmart_food_store_levittown.pdfIn PDF document text
    • http://xotokuwawa.pbworks.com/w/file/fetch/144700143/dupifu.pdfIn PDF document text
    • http://vogituvu.pbworks.com/f/aura_carlos_fuentes_libro_completo.pdfIn PDF document text
    • http://vawaguzidatu.pbworks.com/f/xifulagagadutuno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24cb340f-dacb-4955-ade6-b331be3042a8/nfl_schedule_2015_week_7_2019.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD996 5464 bytes
SHA-256: 605c3d34267f9bf14ed2591b53194e34a773b676f4a34b1d33fe6f84b6c007c7
font_01_sfnt_off0000ec2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2F 10440 bytes
SHA-256: aa804541816426101e507c7dab3b62b314c3de8dd933a1768e3a6fd3941da6a5