Malicious PDF — malware analysis report

Static analysis result for SHA-256 18d28e6ea4d7029f…

MALICIOUS

PDF

69.8 KB Created: 2021-03-15 05:02:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 3a5aa8cad859e0c45fa2d317e0b594aa SHA-1: f571dc675032a5be84cbc55585e24620a8ecfb06 SHA-256: 18d28e6ea4d7029f9b4e1687b9168978a0228401e8813b9429b72b82d55dd206
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to 'town hall 10 base defense', likely directing users to one of the many embedded malicious URLs for further exploitation. The presence of multiple disposable domains and link farms indicates a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/wix?keyword=town+hall+10+base+defense PDF link annotation
    • http://xivazokib.medianewsonline.com/483206391.pdfIn PDF document text
    • http://nenegifivujaxu.mypressonline.com/how_to_convert_to_word_doc_for_free.pdfIn PDF document text
    • http://ita-talia.fun/20278752618mygnw.pdfIn PDF document text
    • https://lagisarer.weebly.com/uploads/1/3/4/1/134131240/4593746.pdfIn PDF document text
    • http://mitimewigupito.mypressonline.com/vogaroluloja.pdfIn PDF document text
    • http://wodekenizowa.getenjoyment.net/xemenibotowumaxugu.pdfIn PDF document text
    • http://constructionhouse.info/bronx_masquerade_summarykgsxv.pdfIn PDF document text
    • https://loniforuwo.weebly.com/uploads/1/3/4/9/134904684/9901331.pdfIn PDF document text
    • http://lanejaselisipu.22web.org/32487859957.pdfIn PDF document text
    • http://gitamoravazini.22web.org/68455989982.pdfIn PDF document text
    • https://gixatupugibezi.weebly.com/uploads/1/3/5/2/135296842/zepijofi_perejebisowewiv_sagitabowo_joselive.pdfIn PDF document text
    • http://manibupefif.mypressonline.com/37976242594.pdfIn PDF document text
    • https://tonezesonor.weebly.com/uploads/1/3/2/6/132681734/wapenoninej-roxufiwejikup.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424981/normal_600914bce0675.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412170/normal_5fe1b0c6ccbdc.pdfIn PDF document text
    • https://pudoxarunisit.weebly.com/uploads/1/3/1/1/131164251/velatapurijupoj.pdfIn PDF document text
    • http://senteber.site/how_to_schedule_honeywell_t6_pro_thermostatebv1h.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/rewepalazamiso/fallout_4_endurance_bobblehead_location_map.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/ibm_logo_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/last_version_of_instagram.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/superdry_ladies_jacket_size_guide.pdfIn PDF document text
    • http://ribuxuvotamu.rf.gd/spider_man_android_games_free_apk.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_off0000d663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD663 5276 bytes
SHA-256: c3125773ff1c275e51614fc33cc6e9d7a2499fc19fd3e5290604114fd7f068b9
font_01_sfnt_off0000e860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE860 9904 bytes
SHA-256: 00d579a06801719493a994b7d847ac5d1e67c3723db998e7be58e3c64602cef5

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