Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3ceffffd4fa81a4…

MALICIOUS

PDF

72.5 KB Created: 2021-03-16 01:53:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f11e53d97b31188111fd960143a84b85 SHA-1: 64ccc5a3e7e15258bce73665a063969d76c0594e SHA-256: f3ceffffd4fa81a437d1a21c82fa4cceecc514a385756c31ed5879149ef71055
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a credential phishing attack targeting Yahoo users. The document impersonates the brand and directs users to a malicious PDF hosted on a redirector, likely to facilitate credential harvesting. The presence of external URIs and link farm heuristics further supports its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://xefezabegeritaj.weebly.com/uploads/1/3/1/3/131379478/vedekopajopujaner.pdf.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://soxebez.ru/wix?keyword=bt+yahoo+login+problems+today PDF link annotation
    • http://stankoff.org/downtown_song_mp4sw5ia.pdfIn PDF document text
    • http://tefitagesev.mypressonline.com/netgear_nighthawk_ac2100_vs_ac2600.pdfIn PDF document text
    • http://chambrehq.xyz/what_is_the_difference_between_plantronics_voyager_5200_and_voyager_legend6p97u.pdfIn PDF document text
    • https://xefezabegeritaj.weebly.com/uploads/1/3/1/3/131379478/vedekopajopujaner.pdfIn PDF document text
    • https://cdn.sqhk.co/nomavunut/8qjgtje/tikalakudesaxesarofisawuz.pdfIn PDF document text
    • http://thecaffeinatedstudent.com/how_much_does_a_truck_driver_make_in_nyc7dkyk.pdfIn PDF document text
    • http://pubgmobiie.com/national_aboriginal_and_torres_strait_islander_education_policy_1989r0evu.pdfIn PDF document text
    • http://braco.ru/13737112669akq98.pdfIn PDF document text
    • http://zathkatow.xyz/canoscan_lide_220_setup_cdrac7b.pdfIn PDF document text
    • https://labaveboto.weebly.com/uploads/1/3/4/6/134611097/laname_mukabole_sedukoji.pdfIn PDF document text
    • http://lowusonuraku.mygamesonline.org/51115871948.pdfIn PDF document text
    • http://zunuruxeguxifi.mygamesonline.org/2010_camaro_ss_l99_0-60.pdfIn PDF document text
    • https://japafapu.weebly.com/uploads/1/3/1/4/131437770/zudewudaxekowo.pdfIn PDF document text
    • http://badge-verification-center.com/car_camcorder_fhd_1080p_manual_romana8bhpu.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/jibhbvS/world_soccer_league_hero_football_flick_shoot_2018.pdfIn PDF document text
    • https://gemuvubakada.weebly.com/uploads/1/3/4/4/134494784/66273.pdfIn PDF document text
    • https://sibozigoguxo.weebly.com/uploads/1/3/0/9/130969143/kekekowubuf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xeponodij/percy_jackson_sea_of_monsters_graphic_novel_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/whats_a_good_vegan_cookbook.pdfIn PDF document text
    • http://zatuvejamubolo.atwebpages.com/craftsman_professional_aluminum_motorcycle_atv_jack_manual.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_off0000dd41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD41 5664 bytes
SHA-256: 9f1fde72b385fbd014def9e705e57d1cc920f2a49d4b926cc1c1f924786abf88
font_01_sfnt_off0000f059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF059 10656 bytes
SHA-256: dd568b1f35ef51283fb7d3ae881648e0c1e3fd810b81969dad39c80665d83d87