Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b2615057640bcb5…

MALICIOUS

PDF

72.7 KB Created: 2021-05-11 14:42:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d40d08d84fcc9fe9551979f7de8a4a5b SHA-1: 9818ca28f78ea25bda88e4f816ffb7a67090f46c SHA-256: 8b2615057640bcb5d6ecceac2efbecf485891f261c496381ee3d62cec27e1bcf
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URI pointing to 'ponafet.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to 'Diary of a Wimpy Kid' to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=diary+of+a+wimpy+kid+book+series+paperback PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417525/normal_6052b596ae73a.pdfIn PDF document text
    • http://dozawudefe.iblogger.org/gmat_official_practice_test.pdfIn PDF document text
    • http://bijipejip.iblogger.org/tezipi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499329/normal_5fdfa8a29249d.pdfIn PDF document text
    • https://kaxozugusejerob.weebly.com/uploads/1/3/1/4/131452826/a1c78af0.pdfIn PDF document text
    • https://bujubupe.weebly.com/uploads/1/3/1/4/131437121/4ebe05.pdfIn PDF document text
    • http://sosunimepewe.22web.org/konar_tamil_guide_9th_free_2018.pdfIn PDF document text
    • https://tagosijotibaza.weebly.com/uploads/1/3/1/4/131407106/lokagaxavu_nufakapaseduko_novibek.pdfIn PDF document text
    • https://dajoromu.weebly.com/uploads/1/3/4/3/134309711/vatupunelan.pdfIn PDF document text
    • http://vasazuruxu.iblogger.org/47505696149.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c7f63c8-7c52-4111-9849-0acb9bbaabc1/zuvenowevida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4261e9c6-d4a4-4e9b-8905-bc495789ac9f/puzakazurigonetizewafo.pdfIn PDF document text
    • https://s3.amazonaws.com/nafoxuda/difference_between_manager_and_leader_presentation_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/furunumaroxun/remington_700_serial_number_lookup.pdfIn PDF document text
    • http://dupukaxibubot.epizy.com/14890364739.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c510dc0-ee05-4aeb-a8bf-22e61772a7be/lowrance_elite_5_fishfinder_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/kenmore_gas_range_igniter_repair.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/bajijiguba.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/jimubuzuxod.pdfIn PDF document text
    • http://jenusaselilavat.rf.gd/baby_girl_dresses_for_photoshoot.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_off0000db1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1C 5668 bytes
SHA-256: 9409beb44cbe2dc50ed438f1f135f7fca5aa75a7b3e3842f0f37d2b03ddeea24
font_01_sfnt_off0000ee75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE75 11076 bytes
SHA-256: 6af3d8225e87d9dbe56ba712312b33c9fa9a99f55daea94c4040e023227963fe

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