Malicious PDF — malware analysis report

Static analysis result for SHA-256 1193454838302dd4…

MALICIOUS

PDF

82.7 KB Created: 2021-03-20 17:53:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a1f79726a6742e50e3b3001b27b36d86 SHA-1: 5a39079714b8fecc08192982b59fc150bd5d6d3c SHA-256: 1193454838302dd45f7bab69d71ddc9417919d0ce6dc3c8ee6d3e0aabe382efc
146 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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.
  • 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://dugedepap.ru/award?keyword=brownells+ar+15+catalog+pdf PDF link annotation
    • http://benivosefemiza.medianewsonline.com/bardale_fmt_download.pdfIn PDF document text
    • http://perfectiona.online/sample_sheet_illumina_miseqw70g6.pdfIn PDF document text
    • http://micrometer25bill.site/how_do_i_balance_my_lg_top_load_washeraz3pb.pdfIn PDF document text
    • https://nimosawi.weebly.com/uploads/1/3/5/9/135982357/delepabepagesikagamo.pdfIn PDF document text
    • http://vorakumezaxof.mygamesonline.org/zetomuganubuni.pdfIn PDF document text
    • https://vogapixafaroge.weebly.com/uploads/1/3/4/2/134234717/tutajedovukis-zamixad-pivikevulo-mudupe.pdfIn PDF document text
    • http://zomolejefej.mywebcommunity.org/barska_safe_not_opening.pdfIn PDF document text
    • http://salea.site/28814654940bh0f1.pdfIn PDF document text
    • http://autobuff.xyz/how_to_collect_on_a_judgment_in_illinoishh2vo.pdfIn PDF document text
    • https://weludabaner.weebly.com/uploads/1/3/4/8/134854782/fafiwewo-kefolibabavovoj.pdfIn PDF document text
    • http://riwozizedilar.mygamesonline.org/101439939.pdfIn PDF document text
    • http://jonebukusopovet.mygamesonline.org/what_is_polygamy_marriage.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/samepelobafemafo.pdfIn PDF document text
    • http://supariwepexafat.mywebcommunity.org/30609064127.pdfIn PDF document text
    • http://mevesepegubisis.scienceontheweb.net/ingls_bsico_daniel_welsch_gratis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jujobope.atwebpages.com/saxazaxivulebodipisafosit.pdfIn PDF document text
    • https://aa514bbb-a96e-4bc9-8ff3-0ca2edd1104f.filesusr.com/ugd/3fc21f_ca15ed769bdd4d7ca03b67f341165541.pdf?index=trueIn PDF document text
    • http://kofaxafogi.myartsonline.com/vocalise_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/43372071733.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/capacitors_basics.pdfIn PDF document text
    • https://s3.amazonaws.com/tojazudibumogab/ponaloxuj.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/weight_watchers_diet.pdfIn PDF document text
    • https://923a8ca3-316b-4844-b38f-9bc955ad4852.filesusr.com/ugd/312e0e_2ebcdd0049d547be976cbea8a37704ee.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/tusefodewikofagazosazoko.pdfIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_95c121b807d048cebe17a2787c75ca2e.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC38 5640 bytes
SHA-256: 2f06d51993627008042589f4e1d5facc4ce6c80890d94ae10943852e6868d96d
font_01_sfnt_off0000ff93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF93 11956 bytes
SHA-256: 5b72fce166dab76872bf62f7ab46857f3d5d892581e5836d774d59093e591497
font_02_sfnt_off000127e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127E3 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd