Malicious PDF — malware analysis report

Static analysis result for SHA-256 fec200b351a947cb…

MALICIOUS

PDF

104.3 KB Created: 2021-03-25 15:44:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 198fd999402117c768982eaaec1e943e SHA-1: d7c5792f33a4e661266058c7e30576c1be58d4f6 SHA-256: fec200b351a947cb2a9b6cbc835fd152ea8fa706bad0cf10dc30abc56e10b9d4
206 Risk Score

Malware Insights

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

The file is identified as malicious by ML classification and ClamAV, with heuristics indicating it's part of a link farm and a callback phishing lure. The document body, though heavily obfuscated, suggests a query related to discounts, which aligns with phishing or scam lures. The presence of numerous external URLs, including one pointing to a potentially malicious domain, supports the phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • 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.
  • 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://botokaw.ru/strik?utm_term=does+rogue+fitness+offer+first+responder+discount PDF link annotation
    • http://mixikoxuve.22web.org/adenitis_inguinal_abscedada.pdfIn PDF document text
    • http://miravozexafoxiw.iblogger.org/building_construction_notes.pdfIn PDF document text
    • http://goxezidoge.22web.org/segonedafizumirusesibesa.pdfIn PDF document text
    • http://topanusijazamib.22web.org/20889004907.pdfIn PDF document text
    • http://itawegan.fun/animal_crossing_hair_salon_guide0x79x.pdfIn PDF document text
    • http://dombitarf.ru/logozefaxeloseletuwilo0mw1z.pdfIn PDF document text
    • http://pivowave.iblogger.org/boy_scout_store_massapequa_ny.pdfIn PDF document text
    • http://katalog-siberian-force.online/review_of_rob_bell_book_love_winsxzasa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e809654a-a95b-4dbc-a338-24085255a2f8.filesusr.com/ugd/1b6cec_be25373b84a746188fcacb9c25200e39.pdf?index=trueIn PDF document text
    • https://5ec50ee2-6c76-415b-b731-82d7de26534b.filesusr.com/ugd/826e74_52f6cb8490aa444d9eba3275f029bb14.pdf?index=trueIn PDF document text
    • https://09972071-4174-499b-90b1-de3619f59f53.filesusr.com/ugd/d1c05f_70422e343f784b30ab2a03a91cbab918.pdf?index=trueIn PDF document text
    • http://koxepari.rf.gd/simotusepaseti.pdfIn PDF document text
    • https://535f918c-e50e-4760-9dbe-4b22a9cc1357.filesusr.com/ugd/65883d_173fc1258dda47ebbceccb39a2f46b3f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/adobe_photoshop_cs5_filehippo.pdfIn PDF document text
    • https://27475d5a-2981-497d-8cd5-0c310ef10f8b.filesusr.com/ugd/9cb927_45f3e402fc79400f868c6db8d2f8d5fd.pdf?index=trueIn PDF document text
    • https://329f26c8-0235-4118-8622-173d264d9cf1.filesusr.com/ugd/221f3a_5c3f319bb41b44c1a6baf90f073a8a12.pdf?index=trueIn PDF document text
    • http://vomifavub.epizy.com/banana_panama_disease.pdfIn PDF document text
    • https://944456f3-75eb-4cd6-bbfd-656b3713ada1.filesusr.com/ugd/2c8d66_8866cb940c2a4ebf8e0aa67369985d7c.pdf?index=trueIn PDF document text
    • https://7f06b679-e14d-4525-8955-d56a7cf6f710.filesusr.com/ugd/79e5df_7fbfbb7488a84795ad84e9c37e009615.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/gunetafonowibasotazo.pdfIn PDF document text
    • https://30b7a97f-6117-4fff-8876-4b3c2220b6c6.filesusr.com/ugd/15cd4d_f103539fe129409788e433ffa9ae6e8d.pdf?index=trueIn PDF document text
    • http://gazusoketa.epizy.com/zodafanizuni.pdfIn PDF document text
    • https://6196a4e6-b3b5-4a85-a139-4ec84e0a53d9.filesusr.com/ugd/d01287_6f6548e749fc4461af08d9bf64e3b9e6.pdf?index=trueIn 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_off00015a3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A3F 5080 bytes
SHA-256: 07f7dd390d54e3a7b404b9b99c2119291db6a47a2cf2b9745386ed5d4f09a6f3
font_01_sfnt_off00016ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BA2 11756 bytes
SHA-256: 55ce4da6ddc419a21e09792f5a7a5db08d465039b34e3915f8144c7a8d5dfd83