Malicious PDF — malware analysis report

Static analysis result for SHA-256 a036faae8f661045…

MALICIOUS

PDF

78.3 KB Created: 2021-03-17 00:14:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d507d64e63cb1005c8a7cfcd762eb90f SHA-1: aea81c0b666ef951d7f44b4c08e1f9d5861581a5 SHA-256: a036faae8f661045d9e5c7f938cc2777fef1c067a770fb0ea604588d2e6f096f
196 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are part of an SEO link farm, indicating a phishing or malware distribution attempt. The presence of a redirector URL suggests an attempt to obscure the final malicious destination. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious intent, likely related to phishing or malware delivery.

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jumiwimov.ru/strik?utm_term=2002+vw+jetta+1.8+t+transmission+fluid+check PDF link annotation
    • http://nijalatol.mypressonline.com/end_of_life_software_best_practices.pdfIn PDF document text
    • https://zikowajemaje.weebly.com/uploads/1/3/1/6/131607239/c12be1f.pdfIn PDF document text
    • http://vidclips.design/what_is_tcp_ip_architecturer7cji.pdfIn PDF document text
    • http://astropsychology.site/pixemarutagulibpng7.pdfIn PDF document text
    • http://kukushpa.fun/zagabuluvifetucwqze.pdfIn PDF document text
    • https://riluvozig.weebly.com/uploads/1/3/4/3/134380056/9124391.pdfIn PDF document text
    • https://nugiwilog.weebly.com/uploads/1/3/1/3/131384260/supibe.pdfIn PDF document text
    • https://suwudaxodorepe.weebly.com/uploads/1/3/4/8/134885248/b23dfc2921a71c.pdfIn PDF document text
    • http://jepekimeba.iblogger.org/zemalijigelalemozutoforur.pdfIn PDF document text
    • https://najoxoveg.weebly.com/uploads/1/3/4/6/134677255/2426650.pdfIn PDF document text
    • https://vugevosuza.weebly.com/uploads/1/3/5/3/135328642/bipemefer.pdfIn PDF document text
    • http://gidujepeparu.22web.org/jelukiwivakopamefatixa.pdfIn PDF document text
    • http://busimaderule.mywebcommunity.org/tapejenosere.pdfIn PDF document text
    • http://xubajur.mygamesonline.org/literal_equations_calculator_mathway.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pitareri.rf.gd/my_life_after_death_erik_medhus.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/ranas.pdfIn PDF document text
    • http://nazowovemozugiv.myartsonline.com/bdm_test.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/vimogivepatuzunadu.pdfIn PDF document text
    • https://s3.amazonaws.com/garorowa/wubowevexuxagula.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/33006079901.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/wizezidavesivexalivemifum.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_off0000f2ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AE 6008 bytes
SHA-256: 1d19181373bbc3fcff3f565973bc828cd632b62879c7fc8435146cbf49209c28
font_01_sfnt_off00010721.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10721 10760 bytes
SHA-256: 730063bd4e626fab0af5db5503d23c689e4e7a7658af18f268b9a062d82c016e

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