Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2da467a7d4d611e…

MALICIOUS

PDF

137.8 KB Created: 2021-03-09 06:19:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 897c3c3dd19b163f3b403424280e919b SHA-1: 00b61c612571b6630835918dd676dc869db0a9dc SHA-256: a2da467a7d4d611e7831193fbbe4fca0ccead2897f6270cc346f8fa438e9c0fa
126 Risk Score

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'maypoin.ru' which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to a specific encyclopedia, aiming to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/award?keyword=the+crc+encyclopedia+of+mathematics+third+edition+pdf PDF link annotation
    • https://vaforiduzaxofa.weebly.com/uploads/1/3/4/3/134367440/wekesarixox_jikugag_vinaxube.pdfIn PDF document text
    • http://checkmyscore.info/how_to_treat_a_pimple_in_your_earpgxab.pdfIn PDF document text
    • http://zisuroto.mygamesonline.org/jixetixudot.pdfIn PDF document text
    • https://volasetabis.weebly.com/uploads/1/3/4/8/134879514/8137e26dcdfc559.pdfIn PDF document text
    • https://nogikukejigili.weebly.com/uploads/1/3/0/8/130873965/sobenilono_jikozada.pdfIn PDF document text
    • http://sevesasineja.22web.org/pugerapisuj.pdfIn PDF document text
    • http://epipog.com/tilivagumawatntqef.pdfIn PDF document text
    • https://losuwasujiro.weebly.com/uploads/1/3/1/6/131637226/286297.pdfIn PDF document text
    • http://modozadubop.mywebcommunity.org/a_first_course_in_differential_equations_the_classic_fifth_edition.pdfIn PDF document text
    • http://reduslim-buy.site/do_you_have_to_have_a_license_to_be_a_minister0uwmk.pdfIn PDF document text
    • https://tetunabirudav.weebly.com/uploads/1/3/0/8/130874278/susirunukixasevozeg.pdfIn PDF document text
    • https://dirotigakavomak.weebly.com/uploads/1/3/4/2/134235834/lutitaba_lalox_baporixozizomu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://megigezorozo.atwebpages.com/9669003437.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/gunidemule.pdfIn PDF document text
    • http://nexovototato.epizy.com/25096561617.pdfIn PDF document text
    • http://goxafufi.rf.gd/me_after_you_paul_kim_piano_chords.pdfIn PDF document text
    • http://woranuganavot.myartsonline.com/25006455330.pdfIn PDF document text
    • http://bidusopevix.epizy.com/12048214416.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/prostate_cancer_contouring_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/meteor_hammer_io_android_1.pdfIn PDF document text
    • http://fazajupozapufo.rf.gd/roravimudolajimaxiralokes.pdfIn PDF document text
    • http://rixuroruwe.myartsonline.com/75028014769.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001c814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C814 7480 bytes
SHA-256: 7b2d602d9b2ebe6861d55b6633497653375d198d7d360b95826471c4d4b469a5
font_01_sfnt_off0001e10d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E10D 5444 bytes
SHA-256: a7887231b6498d8d203656d7d93ff1f7341ac33dde9ec16dc1977ef2f4d836b7
font_02_sfnt_off0001f370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F370 10936 bytes
SHA-256: bcf74962cffdddc3bc15133b4fe12377139f119e629194d3d34c8fc104a8f8bf

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