Malicious PDF — malware analysis report

Static analysis result for SHA-256 1778b7bf5514a664…

MALICIOUS

PDF

78.2 KB Created: 2021-03-01 18:00:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: ccf1718d11a2a93734e07f556687b4ca SHA-1: 0727581490d33a68f674cf1728bc260f776331de SHA-256: 1778b7bf5514a664016a647ab630bb7aa26c7e4c9116c01a30f586f1b0f5ed04
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The document body, though partially corrupted, appears to be a lure related to military commendation medals, directing users to external URLs. The presence of numerous PDF links and the ML classifier's high score indicate malicious intent, likely for phishing or distributing further malware.

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://jacksth.ru/award?keyword=how+many+lines+in+a+navy+commendation+medal+citation PDF link annotation
    • https://mofixeridivekux.weebly.com/uploads/1/3/1/6/131606419/9873398.pdfIn PDF document text
    • https://mobasulu.weebly.com/uploads/1/3/0/7/130776822/wekolaboruzepaf-kijalusubo.pdfIn PDF document text
    • https://nabivuzofew.weebly.com/uploads/1/3/6/0/136050188/2497187.pdfIn PDF document text
    • http://gakawisogafuga.mygamesonline.org/baptised_in_the_holy_spirit_and_fire.pdfIn PDF document text
    • https://xinuxarovota.weebly.com/uploads/1/3/0/7/130776268/81227c.pdfIn PDF document text
    • https://rapagifetudi.weebly.com/uploads/1/3/2/6/132682686/3932369.pdfIn PDF document text
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/4382656.pdfIn PDF document text
    • https://dunifavopugi.weebly.com/uploads/1/3/5/3/135312205/gigozexi-rekaka.pdfIn PDF document text
    • http://vadosaj.getenjoyment.net/par_q_examples.pdfIn PDF document text
    • http://vizazovabula.mywebcommunity.org/20628191445.pdfIn PDF document text
    • https://mujiborabasovu.weebly.com/uploads/1/3/4/5/134590634/9416476.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://wuragumok.atwebpages.com/gigasapeku.pdfIn PDF document text
    • http://nidudovuj.epizy.com/zkteco_attendance_management_program.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/conair_clipper_guards_15.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/telugujimutadal.pdfIn PDF document text
    • http://siporoxa.rf.gd/fuvojotezej.pdfIn PDF document text
    • http://pibekolovaxizon.epizy.com/clocking_off_episode_guide.pdfIn PDF document text
    • http://lobunuwofapow.rf.gd/pokalufasatidukutu.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_off0000e967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE967 4992 bytes
SHA-256: 125d70bb1ce0ffd19d469bd43adc70e5279b66ead2ba56d8ff9c6129a9fb43b8
font_01_sfnt_off0000fa5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5D 10200 bytes
SHA-256: 6ea55120165e1c58d91092ee5ab199b2813de607db4b0b93d3b2fa8141937f9c
font_02_sfnt_off00011d20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D20 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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