Malicious PDF — malware analysis report

Static analysis result for SHA-256 414c5f6d19174a30…

MALICIOUS

PDF

81.5 KB Created: 2021-03-15 19:59:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: dd0c0615d4bff12d8974fa0556a5525a SHA-1: 39cc08798198a579b085a77ff6d74582d05cf801 SHA-256: 414c5f6d19174a3010ff8dfc7840638ec4f81ca7663223c042f23e0ecd83177a
126 Risk Score

Malware Insights

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

This PDF document is classified as malicious by ML and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, presenting numerous URLs that appear to be related to software downloads, specifically 'papa's pastaria apk free download for android'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a deliberate attempt to create a deceptive online presence for distributing potentially harmful content. The embedded URLs, such as 'https://zajinet.ru/wix?keyword=papa%2527s+pastaria+apk+free+download+for+android', are likely entry points to malicious payloads or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://zajinet.ru/wix?keyword=papa%2527s+pastaria+apk+free+download+for+android PDF link annotation
    • https://disovipogazita.weebly.com/uploads/1/3/1/3/131398104/sesojixopolixot.pdfIn PDF document text
    • http://bubble1.space/will_cyberpunk_release_earlybzfrr.pdfIn PDF document text
    • http://lokogosomezik.iblogger.org/rutajiganunobuliniv.pdfIn PDF document text
    • http://slmit.fun/848548895517rovj.pdfIn PDF document text
    • http://dosutomek.iblogger.org/dedoneverofuvodapem.pdfIn PDF document text
    • https://mesowusiwa.weebly.com/uploads/1/3/5/9/135975120/448ad9fac5b99.pdfIn PDF document text
    • http://goldenframecollision.com/samomibitujtguqu.pdfIn PDF document text
    • https://rizomoxus.weebly.com/uploads/1/3/4/5/134589692/8858634.pdfIn PDF document text
    • https://wuzikixow.weebly.com/uploads/1/3/0/7/130775075/dfeed5387e9c619.pdfIn PDF document text
    • http://xtrading.buzz/54481597862f60y2.pdfIn PDF document text
    • http://arfesopt.com/at_t_digital_life_customer_service_emailkgk7f.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/c5ecdb0c-b19d-416c-879b-562c34bef9c8/miritepobufalubosewima.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcf178ae-f79a-4ce5-b891-2a9e2a523415/08_ford_escape_tire_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19065066-f370-44e2-bab8-ace55f0710d7/what_does_zao_xing_mean_in_chinese.pdfIn PDF document text
    • http://fisazivibutaz.epizy.com/kepenosusupopebapi.pdfIn PDF document text
    • http://gepubefe.epizy.com/good_fishing_lures_for_striped_bass.pdfIn PDF document text
    • http://gagokirabi.rf.gd/domain_and_range_function_practice_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52a2f6cb-6378-4647-83e4-14f5ce738521/zowigekabaxumuvoj.pdfIn PDF document text
    • http://guwajogijifode.rf.gd/reported_speech_english_grammar_video.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_off0000f758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF758 5228 bytes
SHA-256: 255a15944cc76888ef51b674d73f1ce0b935bfc1d336f983ce9be8a3176118d7
font_01_sfnt_off00010941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10941 2008 bytes
SHA-256: 5f515afc1c37b5b09174eadfee26d829c93fe02d07adf8cb7946402f6b6c97ec
font_02_sfnt_off000112ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112EA 10804 bytes
SHA-256: b035792ccabb2f20b8bb81a667df9e122b407c3f7862fb10ea5b25cceea33799