Malicious PDF — malware analysis report

Static analysis result for SHA-256 7101fa577b17231f…

MALICIOUS

PDF

119.9 KB Created: 2021-08-17 16:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ff333cae275a6d27d058c088c0b5f05d SHA-1: f29f2254b2c4600726b9b5f0a9ad485c8196f3e4 SHA-256: 7101fa577b17231fb98d818d297366014da185902dee264578b7eada1820dbfa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://aawyx.com/sites/default/imageuser/file/42831145331.pdf In PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/jipevizeweju.pdfIn PDF document text
    • https://rubyyadav.com/nbloom/fckuploads/file/44415842705.pdfIn PDF document text
    • https://botroul.be/uploads/rumuwona.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/f3462e52dcd1d771ba02120b7ad30cb5/loratirakopafuvix.pdfIn PDF document text
    • http://bestpokeya.com/uploads/files/galidobomudefaxuje.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/lixananiwidilojoviviwesam.pdfIn PDF document text
    • http://keitbg.com/images/files/gododojinunagofagowumub.pdfIn PDF document text
    • http://isgsrl.it/images/file/gobiw.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/mlmgjur15d8hioclvrqoeejk36/ramexupedetavadisajib.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/818338ed1943765ddd051313f62a8871/fujulorudilefowuxilozexot.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607637c875c10---91545852266.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/d3388125a42fc15e2d52f34ba46d2924/394950407.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16108a11987116---69718209569.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210517012028_1317395847.pdfIn PDF document text
    • http://sushinamu.com/uploads/files/fapajivevetubuvedojapeke.pdfIn PDF document text
    • http://asckhn.com/acskhn/userfiles/file/vuluvelezobutimepalazu.pdfIn PDF document text
    • https://zzhqhi.com/d/files/genulavabop.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/1415496329.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987a272b033---tofotadinopakowipezom.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/0nbmjm7pr0lrqpagam9fboh4t5/xaturozawuleneravobidusew.pdfIn PDF document text
    • http://xn--e1aazeoc7d.xn--p1ai/images/shared/file/10526772369.pdfIn PDF document text
    • http://art-lan.ru/uploads/assets/file/55635890811.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=twilight+release+date+2014PDF link annotation
    • 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://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_off00016fb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FB5 18584 bytes
SHA-256: ad0251087c68c0995b008d2588c7b7905cd9e9e13b9ec28b8dc9d8ac5dea2ee9
font_01_sfnt_off0001a028.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A028 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001b83f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B83F 10724 bytes
SHA-256: c89fbc4a0fb1a27a8f26b02340556c44d2159253fb7cbaac12229d8973457387

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