Malicious PDF — malware analysis report

Static analysis result for SHA-256 daa3580ef0695baf…

MALICIOUS

PDF

75.0 KB Created: 2021-06-13 08:05:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: abbc035b1fe064ac903e042db44c8a36 SHA-1: 53a256afe64ab2f9fc419b0893f2281eaabdfa75 SHA-256: daa3580ef0695baf8611ee4e8b978241530115ca607655ddbea0e8951970d697
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain, likely serving as a lure for phishing or malware distribution. The document body, though partially corrupted, suggests a context related to 'sports world listening answer', which is likely a deceptive pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://inwebjor.ru/pbw?utm_term=sports+world+listening+answer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420454/normal_6046ac4d95159.pdfIn PDF document text
    • https://dalowosa.weebly.com/uploads/1/3/4/3/134383453/zesej_daxozosavema_guloran_xegebojizowukix.pdfIn PDF document text
    • https://tefeteti.weebly.com/uploads/1/3/0/9/130969297/1807204.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450249/normal_6054eb5f66303.pdfIn PDF document text
    • https://ligukabulalen.weebly.com/uploads/1/3/7/4/137499847/nulojemojatova_liziviz.pdfIn PDF document text
    • https://monuwapomobi.weebly.com/uploads/1/3/4/7/134730240/7402947.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496015/normal_6016aa376356a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372378/normal_605f5b9a3cf39.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374021/normal_5fca698a24524.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/fd43355f-a697-43ad-9d51-a1dcb03de017/driver_booster_8_key_code.pdfIn PDF document text
    • http://jizakatum.pbworks.com/w/file/fetch/144519732/rezijuzitogifo.pdfIn PDF document text
    • http://rasovuxosew.pbworks.com/w/file/fetch/144564150/linear_algebra_with_applications_9th_edition_textbook_solutions.pdfIn PDF document text
    • http://zutaman.pbworks.com/w/file/fetch/145139091/pinoduxoroz.pdfIn PDF document text
    • http://vikiruji.pbworks.com/w/file/fetch/144720816/gilusibidu.pdfIn PDF document text
    • http://tejudafo.pbworks.com/w/file/fetch/144592593/oyun_yneticisi_cs_1.6_full_indir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ab1e9ce-cfbd-4f61-951e-5be89f84c208/fizajad.pdfIn PDF document text
    • http://ritijix.pbworks.com/f/chandni_chowk_market_closed_on.pdfIn PDF document text
    • http://popuwepux.pbworks.com/w/file/fetch/145188858/goblin_stay_with_me_piano_notes.pdfIn PDF document text
    • http://gemometis.pbworks.com/w/file/fetch/144901965/womujo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9a967f6f-c684-4b26-91fd-0b49e7af84fb/videdubukosifesux.pdfIn PDF document text
    • http://wixugigir.pbworks.com/f/bonded_pair_dog_adoption_near_me.pdfIn PDF document text
    • http://lexibitite.pbworks.com/w/file/fetch/144776103/how_to_find_grammatical_errors_in_a_sentence.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ec720e9-dc86-4c14-bb81-5d664f1ac82e/zarujebizogowitufapejow.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_off0000e861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE861 5324 bytes
SHA-256: f2017f9c85a08e9528c1c5eeaca868d9906a948cab1e2bd67166d90d4a87d2a8
font_01_sfnt_off0000fa98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA98 10672 bytes
SHA-256: 3b86a48d47876cfb0fb48ddf5931765e86f2571f9a4029d6fba3101b953fc3c7