Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fe70d324110b844…

MALICIOUS

PDF

73.8 KB Created: 2021-04-04 02:09:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: d77f379b3f788871234b5a13dbb16ec3 SHA-1: b838ff2a640719bb7162dae7da2bf1383624fcca SHA-256: 0fe70d324110b8445cde6e4dd7df981727297cc25dd0d26407213e819e4c36f6
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, and is also detected by ClamAV as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to direct users to malicious content. The document body, though heavily obfuscated, appears to be a lure related to graduation dates, likely intended to trick users into clicking the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://maypoin.ru/wix?keyword=2020+graduation+date+high+school PDF link annotation
    • https://bozuwosumexoxal.weebly.com/uploads/1/3/2/6/132682772/milisi.pdfIn PDF document text
    • http://suzofovolavuk.scienceontheweb.net/low_carb_keto_food_list.pdfIn PDF document text
    • https://wigazasadus.weebly.com/uploads/1/3/5/9/135974004/luzosodovofid_kapur_lafos_xamufazowod.pdfIn PDF document text
    • http://sepozimog.scienceontheweb.net/broadcaster_bouquet.pdfIn PDF document text
    • https://kulaxewanugig.weebly.com/uploads/1/3/1/3/131384484/2442843.pdfIn PDF document text
    • https://lujetuzamuja.weebly.com/uploads/1/3/4/3/134372728/rawalobofatomow.pdfIn PDF document text
    • https://bojufare.weebly.com/uploads/1/3/1/0/131070992/joxem.pdfIn PDF document text
    • http://bavimobuxadu.medianewsonline.com/ragasarisixukixuro.pdfIn PDF document text
    • http://taxokijoba.sportsontheweb.net/is_fanatics_jerseys_legit.pdfIn PDF document text
    • http://dotavulilego.mypressonline.com/8577514961.pdfIn PDF document text
    • http://liwurivosopap.medianewsonline.com/2471549168.pdfIn PDF document text
    • http://geparup.scienceontheweb.net/56066348111.pdfIn PDF document text
    • https://pufedoxavode.weebly.com/uploads/1/3/4/6/134613169/davobevol_jupudeguki_weritakowore_nuxavakujifoga.pdfIn PDF document text
    • http://gutibefatidag.medianewsonline.com/market_leader_intermediate_business_english_course_book.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f87ce62f-3d5d-4c42-bff3-2e7d00444551.filesusr.com/ugd/72ed28_35af491f2529464db067913d03f4b3c7.pdf?index=trueIn PDF document text
    • https://53002a68-e35f-4167-ac88-1ab9777d7e72.filesusr.com/ugd/f5bc2a_7a516dc8204a417ebba5f4c51480a2a9.pdf?index=trueIn PDF document text
    • https://a1104102-e7f7-498f-9db5-fd16eb5a1c84.filesusr.com/ugd/3f19aa_fd1941429aa8408c8b25a088efa0a8e7.pdf?index=trueIn PDF document text
    • https://f59c0a4d-c104-43ac-8966-a5978cdf1b8c.filesusr.com/ugd/0c1ebd_0cfab7f7d1d1470ebb1b637fd4ea21fb.pdf?index=trueIn PDF document text
    • https://a1359116-1358-4cde-afc5-3600b4bb50db.filesusr.com/ugd/3b0c81_a414d495a9a84d17a660cc54386aa69d.pdf?index=trueIn PDF document text
    • https://0b609444-e5a2-4a7e-9779-a3c6bae51a53.filesusr.com/ugd/529dbf_24a5e13495ca4bae9ca6a8e67734263b.pdf?index=trueIn PDF document text
    • http://bexovivuvere.myartsonline.com/autumn_leaves_partitura_para_guitarra.pdfIn PDF document text
    • https://4ef57e19-9a2e-4e6f-a444-f6b59f982a39.filesusr.com/ugd/4c1554_665cbf2bbf754adea5a9eeb98adb508b.pdf?index=trueIn PDF document text
    • https://1b2c4efd-c8eb-4b04-b26f-b9154d704720.filesusr.com/ugd/d3758e_ddabb1dd2d434c2f891d346ce549c6cc.pdf?index=trueIn PDF document text
    • https://6da1ed31-7a22-45b0-8bc5-463d376071ee.filesusr.com/ugd/29fbaf_b54a8ba5a8184a85b4f1e314edd85e3c.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28D 5380 bytes
SHA-256: 601149d51b19edc24f81b7c8a29671852127ffce1fe2444459a5fb2b4c4dc31e
font_01_sfnt_off0000f4d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D2 10960 bytes
SHA-256: 4232616863e7abd68a46bc06d46dc5fefb5125a9f6af592db8617b31a7bb0242

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