Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fddc29d69b6db70…

MALICIOUS

PDF

82.2 KB Created: 2021-04-11 06:54:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0a9bd8d87ff25d6606415b1e9e207acd SHA-1: 82543689d5f1f6682021816f1e162089029d1442 SHA-256: 1fddc29d69b6db70244e9d75e3fda96f6297a3b4c877aa75a793c6dc96162bb6
176 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one heuristic specifically identifying a 'link farm' pattern. The 'SE_CALLBACK_LURE' heuristic suggests the document's content is designed to trick users into calling a fraudulent number, likely related to a tech support scam. The presence of embedded URLs and the ML classification strongly indicate malicious intent, likely to redirect users to phishing or scam websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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://leonvi.ru/strik?utm_term=why+is+my+wireless+charger+not+working+iphone+11 PDF link annotation
    • http://selectgetc.top/48743998985s4bsw.pdfIn PDF document text
    • http://gedirobidepud.scienceontheweb.net/xijitozudidekezuro.pdfIn PDF document text
    • http://pixeburunov.iblogger.org/femomabim.pdfIn PDF document text
    • http://bunnygummy.ru/what_time_does_walmart_photo_center_openghg6k.pdfIn PDF document text
    • http://puwexakibo.iblogger.org/81389228843.pdfIn PDF document text
    • http://axecheat7.xyz/846671852274mpv3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3e1af3dc-cf37-4f58-935d-0a6065bc5ce9.filesusr.com/ugd/3ca236_4bb64312b2714ad3bce8b0b8e2ca6922.pdf?index=trueIn PDF document text
    • http://nofolimuri.myartsonline.com/sezitob.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/faxoxa.pdfIn PDF document text
    • https://32e47638-7206-44c1-ad53-5c6f9176402e.filesusr.com/ugd/e00742_61bb7f846a6b48a885e0912b4be33160.pdf?index=trueIn PDF document text
    • https://40c507a3-37b7-491f-afd3-f28ba3af1fb2.filesusr.com/ugd/7f5264_8aa240b5b3a943aea66d0f2222d88aae.pdf?index=trueIn PDF document text
    • http://sikopenopod.epizy.com/sample_weekly_plan_template.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/47336488138.pdfIn PDF document text
    • https://5e54d98c-4257-4cc7-9010-48f3df296eb2.filesusr.com/ugd/05240c_3e6530adac9c4461b981cbb778bb4a1b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/befafuni/how_to_make_a_good_composition_in_photography.pdfIn PDF document text
    • https://315736c7-1030-4200-8d24-05c9f4951019.filesusr.com/ugd/d19ca0_1b1dc8eeb25844f586f14a0ec3be32b6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/semenifuxipuwitubawidoxi.pdfIn PDF document text
    • https://a1104102-e7f7-498f-9db5-fd16eb5a1c84.filesusr.com/ugd/3f19aa_ee0d4fd8de61418bb2874f557712c15e.pdf?index=trueIn PDF document text
    • http://nufurezoguboli.epizy.com/nitrogen_fixation_by_rhizobium.pdfIn PDF document text
    • https://9df6fdd8-df71-43fb-87ad-b121b2de7416.filesusr.com/ugd/e0d0cf_2ec8acd40bf04db8af24a8369afd98f8.pdf?index=trueIn PDF document text
    • https://da6a6a96-7907-4aac-bfe3-592928b14ca9.filesusr.com/ugd/39e844_39988e4906ca42e19d5d6b1c104d75e0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/varolexexus/la_biblia_de_jerusalen_en_descargar_gratis.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_off0000fd7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD7D 5668 bytes
SHA-256: 3c7983943965944f13ffcaf89a8be1c79c960c4a0a15842f1934c0436e252888
font_01_sfnt_off000110c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C7 11956 bytes
SHA-256: b58c333e58df935f73d1b55f68198be9b0f14222538a947a4b98ff54846db6e6

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