Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9177a90813bd477…

MALICIOUS

PDF

352.4 KB Created: 2021-03-26 09:31:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: e3409281129f659261837aebc6dc4ab7 SHA-1: 9d4c889c55bb1982b39439c0d29c5938789c880f SHA-256: d9177a90813bd47705c5e730e5a76e64ecf71bcb5ece2777e460f71a24851a89
116 Risk Score

Malware Insights

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

The sample is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it contains external URIs and a callback phishing lure, suggesting it aims to trick users into contacting malicious actors by posing as a legitimate service or issue. While no scripts were explicitly extracted, the presence of embedded URLs and the phishing lure strongly indicate a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9413

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
  • 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://pelibifir.ru/wix?keyword=harrah%2527s+new+orleans+parking+platinum PDF link annotation
    • http://bewerab.22web.org/93773347531.pdfIn PDF document text
    • http://vbnmcxz.xyz/709819626038lan5.pdfIn PDF document text
    • https://cdn.sqhk.co/kurazagizub/2Zhfih3/android_tv_box_mini_pc_media_player.pdfIn PDF document text
    • https://cdn.sqhk.co/fasotaluvose/je4ChaP/magic_wart_cream_reviews.pdfIn PDF document text
    • https://cdn.sqhk.co/niririga/heiafzF/alarm_birds_sound.pdfIn PDF document text
    • https://cdn.sqhk.co/wepurodapike/AhjOLEd/free_printable_alphabet_matching_cards.pdfIn PDF document text
    • http://widuzuduzudovix.iblogger.org/air_plant_care_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/veleviziwew/ig75VHj/takeout_restaurants_open_24_hours.pdfIn PDF document text
    • https://cdn.sqhk.co/lokiwejawe/jasjaia/dusemoxa.pdfIn PDF document text
    • http://3-bureaureport.info/81055877187lhtw1.pdfIn PDF document text
    • http://fitit.space/dyson_cinetic_big_ball_animal_vacuum_filter_cleaning7m8zb.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://toraboretopupu.weebly.com/uploads/1/3/4/7/134769369/xasuke.pdfIn PDF document text
    • https://widewosum.weebly.com/uploads/1/3/0/7/130775244/2685166.pdfIn PDF document text
    • https://cdn.sqhk.co/pugusomimoro/CghgddC/english_words_with_marathi_meaning.pdfIn PDF document text
    • http://bestrongbyg.com/fujupanokjed52.pdfIn PDF document text
    • https://cdn.sqhk.co/tabuguran/cBtaibm/1988_topps_traded_baseball_cards_value.pdfIn PDF document text
    • http://ketousa.site/5386942619ipfg4.pdfIn PDF document text
    • https://nemapawa.weebly.com/uploads/1/3/0/9/130969411/bd644c60c7e5.pdfIn PDF document text
    • http://winoraama.space/94169530511k27rg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://levasufut.rf.gd/sony_str_dh130_specs.pdfIn PDF document text
    • http://savunibuguk.rf.gd/27657521721.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_off0005351d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5351D 5384 bytes
SHA-256: 2c77aed7d286aabe45734fa55962189bd2d51cb874e8e5e1cc5418c7874defa7
font_01_sfnt_off0005475d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5475D 12060 bytes
SHA-256: 7d8e5e8016773ef6c9281492e5e696271f705c339edc4c17b198c77e1d3a5ec1

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