Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbb9319022d0a392…

MALICIOUS

PDF

77.1 KB Created: 2021-03-10 11:42:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 426b872e68cdef05a573a6f213a44465 SHA-1: ca0913e2335e51d5aba98e898ce9ae7d4af85460 SHA-256: dbb9319022d0a3929db1c99b7602292439c58ffefe525007ab3a10cc93c4261c
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The document body, though heavily obfuscated, contains references to product keywords, suggesting a lure. The presence of numerous external URIs, many hosted on disposable domains or link farms, further supports a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://soxebez.ru/aws?utm_term=craftsman+315+garage+door+keypad+battery PDF link annotation
    • https://cdn.sqhk.co/ranetixeba/ibhhBGJ/40064889179.pdfIn PDF document text
    • http://lefuvaguvupawax.iblogger.org/civ_6_best_start_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/basinasedu/jduifkD/zajetawojixup.pdfIn PDF document text
    • http://libutulidux.medianewsonline.com/13_attributes_of_god_list.pdfIn PDF document text
    • https://cdn.sqhk.co/wijelukifap/jaggjfv/chinese_drama_2020_list.pdfIn PDF document text
    • https://cdn.sqhk.co/vazodowadu/jjdjg8s/55512979250.pdfIn PDF document text
    • http://gemobaraza.iblogger.org/quantum_magnetic_analyzer_software.pdfIn PDF document text
    • http://liruroz.iblogger.org/falcon_bms_4.32_download.pdfIn PDF document text
    • http://jotupati.22web.org/bowikilunonobazobeg.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxifopu/EihEifv/space_heater_for_garage.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/bde6c516-7566-4a1b-b655-cd87129fe0a6/35218788362.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/avg_antivirus_full_version_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e24debb-9456-4e63-88a2-377d23c4fcfb/votitugarurepaf.pdfIn PDF document text
    • http://relogevavikidid.epizy.com/element_tv_customer_support_phone_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f154d32b-9a03-420f-8923-d3e3ee11568e/ganivuxejefafaxim.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/limiting_reactant_pre_lab_answers.pdfIn PDF document text
    • http://ruwiterisu.rf.gd/poxoraxebulanuluzirin.pdfIn PDF document text
    • http://bojonovaja.rf.gd/toduvagufatabire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42b4ee3e-10c4-454b-b195-8718f4b8d1e6/rigisiraseretisu.pdfIn PDF document text
    • http://fugufaza.myartsonline.com/what_calorie_deficit_for_weight_loss.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/37714251967.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/borges_y_yo_jorge_luis_borges.pdfIn PDF document text
    • http://genolewedusu.myartsonline.com/lower_back_exercises.pdfIn PDF document text
    • https://s3.amazonaws.com/rilexazejuzovep/95932847157.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_off0000edb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB1 5880 bytes
SHA-256: 28682f25ba509969964d3fff45e403eb2b30c77042d4b3a669ffdb615932a4cd
font_01_sfnt_off000101a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A6 10868 bytes
SHA-256: c4e18cfb83774a28136d51de2ca6e0a4ec87ca7ce62806bb61f99ae063e531d0

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